64974009 has 4 divisors (see below), whose sum is σ = 86632016. Its totient is φ = 43316004.

The previous prime is 64974001. The next prime is 64974023. The reversal of 64974009 is 90047946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64974009 - 2³ = 64974001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64974001) 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, 10828999 + ... + 10829004.

It is an arithmetic number, because the mean of its divisors is an integer number (21658004).

Almost surely, 2^64974009 is an apocalyptic number.

It is an amenable number.

64974009 is a deficient number, since it is larger than the sum of its proper divisors (21658007).

64974009 is a wasteful number, since it uses less digits than its factorization.

64974009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21658006.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 64974009 is about 8060.6456937394. The cubic root of 64974009 is about 402.0189775947.

The spelling of 64974009 in words is "sixty-four million, nine hundred seventy-four thousand, nine".