64967979 has 8 divisors (see below), whose sum is σ = 86750352. Its totient is φ = 43248800.

The previous prime is 64967977. The next prime is 64968017. The reversal of 64967979 is 97976946.

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 64967979 - 2¹ = 64967977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64967977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13344 + ... + 17549.

It is an arithmetic number, because the mean of its divisors is an integer number (10843794).

Almost surely, 2^64967979 is an apocalyptic number.

64967979 is a deficient number, since it is larger than the sum of its proper divisors (21782373).

64967979 is a wasteful number, since it uses less digits than its factorization.

64967979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31597.

The product of its digits is 5143824, while the sum is 57.

The square root of 64967979 is about 8060.2716455464. The cubic root of 64967979 is about 402.0065405733.

The spelling of 64967979 in words is "sixty-four million, nine hundred sixty-seven thousand, nine hundred seventy-nine".