13697647951 has 4 divisors (see below), whose sum is σ = 14751313192. Its totient is φ = 12643982712.

The previous prime is 13697647897. The next prime is 13697647961. The reversal of 13697647951 is 15974679631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13697647951 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 (13697647961) 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, 526832601 + ... + 526832626.

It is an arithmetic number, because the mean of its divisors is an integer number (3687828298).

Almost surely, 2^13697647951 is an apocalyptic number.

13697647951 is a deficient number, since it is larger than the sum of its proper divisors (1053665241).

13697647951 is a wasteful number, since it uses less digits than its factorization.

13697647951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053665240.

The product of its digits is 8573040, while the sum is 58.

The spelling of 13697647951 in words is "thirteen billion, six hundred ninety-seven million, six hundred forty-seven thousand, nine hundred fifty-one".