2657897397 has 12 divisors (see below), whose sum is σ = 3862740544. Its totient is φ = 1761059880.

The previous prime is 2657897393. The next prime is 2657897413. The reversal of 2657897397 is 7937987562.

2657897397 is a `hidden beast` number, since 26 + 578 + 9 + 7 + 39 + 7 = 666.

It is not a de Polignac number, because 2657897397 - 2² = 2657897393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2657897393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 904429 + ... + 907362.

Almost surely, 2^2657897397 is an apocalyptic number.

It is an amenable number.

2657897397 is a deficient number, since it is larger than the sum of its proper divisors (1204843147).

2657897397 is a wasteful number, since it uses less digits than its factorization.

2657897397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811960 (or 1811957 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 63.

The square root of 2657897397 is about 51554.7999414216. The cubic root of 2657897397 is about 1385.2008114169.

The spelling of 2657897397 in words is "two billion, six hundred fifty-seven million, eight hundred ninety-seven thousand, three hundred ninety-seven".