6897638131 has 4 divisors (see below), whose sum is σ = 6899031792. Its totient is φ = 6896244472.

The previous prime is 6897638119. The next prime is 6897638171. The reversal of 6897638131 is 1318367986.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6897638131 - 2⁹ = 6897637619 is a prime.

It is a super-2 number, since 2×6897638131² = 95154823572450346322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6897638171) 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, 689380 + ... + 699313.

It is an arithmetic number, because the mean of its divisors is an integer number (1724757948).

Almost surely, 2^6897638131 is an apocalyptic number.

6897638131 is a deficient number, since it is larger than the sum of its proper divisors (1393661).

6897638131 is a wasteful number, since it uses less digits than its factorization.

6897638131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393660.

The product of its digits is 1306368, while the sum is 52.

The square root of 6897638131 is about 83052.0206316499. The cubic root of 6897638131 is about 1903.5610161660.

The spelling of 6897638131 in words is "six billion, eight hundred ninety-seven million, six hundred thirty-eight thousand, one hundred thirty-one".