64630171 has 4 divisors (see below), whose sum is σ = 65689744. Its totient is φ = 63570600.

The previous prime is 64630147. The next prime is 64630177. The reversal of 64630171 is 17103646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64630171 - 2⁷ = 64630043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64630177) 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, 529695 + ... + 529816.

It is an arithmetic number, because the mean of its divisors is an integer number (16422436).

Almost surely, 2^64630171 is an apocalyptic number.

64630171 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

64630171 is a deficient number, since it is larger than the sum of its proper divisors (1059573).

64630171 is a wasteful number, since it uses less digits than its factorization.

64630171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059572.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 64630171 is about 8039.2892098742. The cubic root of 64630171 is about 401.3085706887.

The spelling of 64630171 in words is "sixty-four million, six hundred thirty thousand, one hundred seventy-one".