239399887 has 8 divisors (see below), whose sum is σ = 251786880. Its totient is φ = 227304480.

The previous prime is 239399863. The next prime is 239399903. The reversal of 239399887 is 788993932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 239399887 - 2⁷ = 239399759 is a prime.

It is a super-2 number, since 2×239399887² = 114624611791225538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239399827) 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 7 ways as a sum of consecutive naturals, for example, 71212 + ... + 74497.

It is an arithmetic number, because the mean of its divisors is an integer number (31473360).

Almost surely, 2^239399887 is an apocalyptic number.

239399887 is a deficient number, since it is larger than the sum of its proper divisors (12386993).

239399887 is a wasteful number, since it uses less digits than its factorization.

239399887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145793.

The product of its digits is 5878656, while the sum is 58.

The square root of 239399887 is about 15472.5526982460. The cubic root of 239399887 is about 620.9280992505.

The spelling of 239399887 in words is "two hundred thirty-nine million, three hundred ninety-nine thousand, eight hundred eighty-seven".