239699897 has 4 divisors (see below), whose sum is σ = 240030336. Its totient is φ = 239369460.

The previous prime is 239699893. The next prime is 239699903. The reversal of 239699897 is 798996932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 239699897 - 2² = 239699893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239699893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164129 + ... + 165582.

It is an arithmetic number, because the mean of its divisors is an integer number (60007584).

Almost surely, 2^239699897 is an apocalyptic number.

It is an amenable number.

239699897 is a deficient number, since it is larger than the sum of its proper divisors (330439).

239699897 is an equidigital number, since it uses as much as digits as its factorization.

239699897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330438.

The product of its digits is 13226976, while the sum is 62.

The square root of 239699897 is about 15482.2445724126. The cubic root of 239699897 is about 621.1873682081.

The spelling of 239699897 in words is "two hundred thirty-nine million, six hundred ninety-nine thousand, eight hundred ninety-seven".