64772017 has 4 divisors (see below), whose sum is σ = 64815856. Its totient is φ = 64728180.

The previous prime is 64772009. The next prime is 64772047. The reversal of 64772017 is 71027746.

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 a cyclic number.

It is not a de Polignac number, because 64772017 - 2³ = 64772009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64772047) 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, 19623 + ... + 22684.

It is an arithmetic number, because the mean of its divisors is an integer number (16203964).

Almost surely, 2^64772017 is an apocalyptic number.

It is an amenable number.

64772017 is a deficient number, since it is larger than the sum of its proper divisors (43839).

64772017 is a wasteful number, since it uses less digits than its factorization.

64772017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43838.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 64772017 is about 8048.1064232526. The cubic root of 64772017 is about 401.6019446191.

The spelling of 64772017 in words is "sixty-four million, seven hundred seventy-two thousand, seventeen".