2397929857 has 4 divisors (see below), whose sum is σ = 2398063536. Its totient is φ = 2397796180.

The previous prime is 2397929819. The next prime is 2397929867. The reversal of 2397929857 is 7589297932.

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 a de Polignac number, because none of the positive numbers 2^k-2397929857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2397929795 and 2397929804.

It is not an unprimeable number, because it can be changed into a prime (2397929867) 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, 34819 + ... + 77512.

It is an arithmetic number, because the mean of its divisors is an integer number (599515884).

Almost surely, 2^2397929857 is an apocalyptic number.

It is an amenable number.

2397929857 is a deficient number, since it is larger than the sum of its proper divisors (133679).

2397929857 is a wasteful number, since it uses less digits than its factorization.

2397929857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133678.

The product of its digits is 17146080, while the sum is 61.

The square root of 2397929857 is about 48968.6619890722. The cubic root of 2397929857 is about 1338.4808388927.

The spelling of 2397929857 in words is "two billion, three hundred ninety-seven million, nine hundred twenty-nine thousand, eight hundred fifty-seven".