64979171 has 4 divisors (see below), whose sum is σ = 65151000. Its totient is φ = 64807344.

The previous prime is 64979099. The next prime is 64979191. The reversal of 64979171 is 17197946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17197946 = 2 ⋅8598973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64979171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64979191) 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, 85346 + ... + 86103.

It is an arithmetic number, because the mean of its divisors is an integer number (16287750).

Almost surely, 2^64979171 is an apocalyptic number.

64979171 is a deficient number, since it is larger than the sum of its proper divisors (171829).

64979171 is a wasteful number, since it uses less digits than its factorization.

64979171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171828.

The product of its digits is 95256, while the sum is 44.

The square root of 64979171 is about 8060.9658850537. The cubic root of 64979171 is about 402.0296237338.

The spelling of 64979171 in words is "sixty-four million, nine hundred seventy-nine thousand, one hundred seventy-one".