64979871 has 16 divisors (see below), whose sum is σ = 94670208. Its totient is φ = 39317600.

The previous prime is 64979869. The next prime is 64979891. The reversal of 64979871 is 17897946.

It is a cyclic number.

It is not a de Polignac number, because 64979871 - 2¹ = 64979869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64979821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26101 + ... + 28481.

It is an arithmetic number, because the mean of its divisors is an integer number (5916888).

Almost surely, 2^64979871 is an apocalyptic number.

64979871 is a deficient number, since it is larger than the sum of its proper divisors (29690337).

64979871 is a wasteful number, since it uses less digits than its factorization.

64979871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222.

The product of its digits is 762048, while the sum is 51.

The square root of 64979871 is about 8061.0093040512. The cubic root of 64979871 is about 402.0310673745.

The spelling of 64979871 in words is "sixty-four million, nine hundred seventy-nine thousand, eight hundred seventy-one".