239998997 has 8 divisors (see below), whose sum is σ = 286210176. Its totient is φ = 196769232.

The previous prime is 239998987. The next prime is 239999021. The reversal of 239998997 is 799899932.

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

It is not a de Polignac number, because 239998997 - 2⁴ = 239998981 is a prime.

It is a super-2 number, since 2×239998997² = 115199037122012018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239998987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745178 + ... + 745499.

It is an arithmetic number, because the mean of its divisors is an integer number (35776272).

Almost surely, 2^239998997 is an apocalyptic number.

It is an amenable number.

239998997 is a deficient number, since it is larger than the sum of its proper divisors (46211179).

239998997 is a wasteful number, since it uses less digits than its factorization.

239998997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490707.

The product of its digits is 19840464, while the sum is 65.

The square root of 239998997 is about 15491.9010131100. The cubic root of 239998997 is about 621.4456354801.

The spelling of 239998997 in words is "two hundred thirty-nine million, nine hundred ninety-eight thousand, nine hundred ninety-seven".