64475217 has 8 divisors (see below), whose sum is σ = 95518880. Its totient is φ = 42983460.

The previous prime is 64475209. The next prime is 64475251. The reversal of 64475217 is 71257446.

64475217 is a `hidden beast` number, since 644 + 7 + 5 + 2 + 1 + 7 = 666.

It is not a de Polignac number, because 64475217 - 2³ = 64475209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64471217) 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, 1193959 + ... + 1194012.

It is an arithmetic number, because the mean of its divisors is an integer number (11939860).

Almost surely, 2^64475217 is an apocalyptic number.

It is an amenable number.

64475217 is a deficient number, since it is larger than the sum of its proper divisors (31043663).

64475217 is a wasteful number, since it uses less digits than its factorization.

64475217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387980 (or 2387974 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 64475217 is about 8029.6461316798. The cubic root of 64475217 is about 400.9875950499.

It can be divided in two parts, 6447 and 5217, that added together give a square (11664 = 108²).

The spelling of 64475217 in words is "sixty-four million, four hundred seventy-five thousand, two hundred seventeen".