239579997 has 16 divisors (see below), whose sum is σ = 349143552. Its totient is φ = 145474560.

The previous prime is 239579969. The next prime is 239579999. The reversal of 239579997 is 799975932.

It is not a de Polignac number, because 239579997 - 2⁷ = 239579869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 239579997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239579999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74188 + ... + 77349.

It is an arithmetic number, because the mean of its divisors is an integer number (21821472).

Almost surely, 2^239579997 is an apocalyptic number.

It is an amenable number.

239579997 is a deficient number, since it is larger than the sum of its proper divisors (109563555).

239579997 is a wasteful number, since it uses less digits than its factorization.

239579997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151588.

The product of its digits is 9644670, while the sum is 60.

The square root of 239579997 is about 15478.3719105079. The cubic root of 239579997 is about 621.0837764691.

The spelling of 239579997 in words is "two hundred thirty-nine million, five hundred seventy-nine thousand, nine hundred ninety-seven".