64892971 has 8 divisors (see below), whose sum is σ = 76238064. Its totient is φ = 54455520.

The previous prime is 64892963. The next prime is 64892983. The reversal of 64892971 is 17929846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64892971 - 2³ = 64892963 is a prime.

It is a super-2 number, since 2×64892971² = 8422195370413682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64892911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226756 + ... + 227041.

It is an arithmetic number, because the mean of its divisors is an integer number (9529758).

Almost surely, 2^64892971 is an apocalyptic number.

64892971 is a deficient number, since it is larger than the sum of its proper divisors (11345093).

64892971 is a wasteful number, since it uses less digits than its factorization.

64892971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453821.

The product of its digits is 217728, while the sum is 46.

The square root of 64892971 is about 8055.6173568511. The cubic root of 64892971 is about 401.8517703873.

The spelling of 64892971 in words is "sixty-four million, eight hundred ninety-two thousand, nine hundred seventy-one".