239899142025 has 27 divisors (see below), whose sum is σ = 429699178389. Its totient is φ = 127942290720.

The previous prime is 239899142023. The next prime is 239899142051. The reversal of 239899142025 is 520241998932.

The square root of 239899142025 is 489795.

It is a perfect power (a square), and thus also a powerful number.

239899142025 is a `hidden beast` number, since 2 + 39 + 89 + 91 + 420 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14585634441 + 225313507584 = 120771^2 + 474672^2 .

It is not a de Polignac number, because 239899142025 - 2¹ = 239899142023 is a prime.

It is a super-2 number, since 2×239899142025² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (239899142023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7330599 + ... + 7363251.

Almost surely, 2^239899142025 is an apocalyptic number.

239899142025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

239899142025 is the 489795-th square number.

239899142025 is the 244898-th centered octagonal number.

It is an amenable number.

239899142025 is a deficient number, since it is larger than the sum of its proper divisors (189800036364).

239899142025 is an frugal number, since it uses more digits than its factorization.

239899142025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65322 (or 32661 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

It can be divided in two parts, 239899 and 142025, that added together give a square (381924 = 618²).

The spelling of 239899142025 in words is "two hundred thirty-nine billion, eight hundred ninety-nine million, one hundred forty-two thousand, twenty-five".