239289961 has 9 divisors (see below), whose sum is σ = 247754493. Its totient is φ = 231106860.

The previous prime is 239289959. The next prime is 239290001. The reversal of 239289961 is 169982932.

The square root of 239289961 is 15469.

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

It is not a de Polignac number, because 239289961 - 2¹ = 239289959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239289901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 479290 + ... + 479788.

It is an arithmetic number, because the mean of its divisors is an integer number (27528277).

Almost surely, 2^239289961 is an apocalyptic number.

239289961 is the 15469-th square number.

239289961 is the 7735-th centered octagonal number.

It is an amenable number.

239289961 is a deficient number, since it is larger than the sum of its proper divisors (8464532).

239289961 is an frugal number, since it uses more digits than its factorization.

239289961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060 (or 530 counting only the distinct ones).

The product of its digits is 419904, while the sum is 49.

The cubic root of 239289961 is about 620.8330468636.

Multiplying 239289961 by its sum of digits (49), we get a square (11725208089 = 108283²).

Multiplying 239289961 by its product of digits (419904), we get a square (100478811783744 = 10023912²).

The spelling of 239289961 in words is "two hundred thirty-nine million, two hundred eighty-nine thousand, nine hundred sixty-one".