64172697 has 12 divisors (see below), whose sum is σ = 88416720. Its totient is φ = 41399880.

The previous prime is 64172683. The next prime is 64172701. The reversal of 64172697 is 79627146.

It is not a de Polignac number, because 64172697 - 2¹⁰ = 64171673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64172617) 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, 8247 + ... + 14012.

It is an arithmetic number, because the mean of its divisors is an integer number (7368060).

Almost surely, 2^64172697 is an apocalyptic number.

It is an amenable number.

64172697 is a deficient number, since it is larger than the sum of its proper divisors (24244023).

64172697 is a wasteful number, since it uses less digits than its factorization.

64172697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22324 (or 22293 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 64172697 is about 8010.7862909954. The cubic root of 64172697 is about 400.3594622871.

The spelling of 64172697 in words is "sixty-four million, one hundred seventy-two thousand, six hundred ninety-seven".