64371971 has 8 divisors (see below), whose sum is σ = 66238560. Its totient is φ = 62512128.

The previous prime is 64371947. The next prime is 64371991. The reversal of 64371971 is 17917346.

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 64371971 - 2¹⁸ = 64109827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64371941) 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, 22595 + ... + 25283.

It is an arithmetic number, because the mean of its divisors is an integer number (8279820).

Almost surely, 2^64371971 is an apocalyptic number.

64371971 is a deficient number, since it is larger than the sum of its proper divisors (1866589).

64371971 is a wasteful number, since it uses less digits than its factorization.

64371971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373.

The product of its digits is 31752, while the sum is 38.

The square root of 64371971 is about 8023.2145054211. The cubic root of 64371971 is about 400.7734430839.

The spelling of 64371971 in words is "sixty-four million, three hundred seventy-one thousand, nine hundred seventy-one".