258019969 has 3 divisors (see below), whose sum is σ = 258036033. Its totient is φ = 258003906.

The previous prime is 258019967. The next prime is 258019987. The reversal of 258019969 is 969910852.

The square root of 258019969 is 16063.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 258019969 - 2¹ = 258019967 is a prime.

It is a super-2 number, since 2×258019969² = 133148608805521922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258019961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8032 + ... + 24094.

It is an arithmetic number, because the mean of its divisors is an integer number (86012011).

Almost surely, 2^258019969 is an apocalyptic number.

258019969 is the 16063-rd square number.

258019969 is the 8032-nd centered octagonal number.

It is an amenable number.

258019969 is a deficient number, since it is larger than the sum of its proper divisors (16064).

258019969 is an frugal number, since it uses more digits than its factorization.

258019969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32126 (or 16063 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 49.

The cubic root of 258019969 is about 636.6260999831.

Multiplying 258019969 by its sum of digits (49), we get a square (12642978481 = 112441²).

The spelling of 258019969 in words is "two hundred fifty-eight million, nineteen thousand, nine hundred sixty-nine".