64979953 has 4 divisors (see below), whose sum is σ = 65762928. Its totient is φ = 64196980.

The previous prime is 64979951. The next prime is 64979963. The reversal of 64979953 is 35997946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35997946 = 2 ⋅17998973.

It is a cyclic number.

It is not a de Polignac number, because 64979953 - 2¹ = 64979951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64979953.

It is not an unprimeable number, because it can be changed into a prime (64979951) 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 3 ways as a sum of consecutive naturals, for example, 391363 + ... + 391528.

It is an arithmetic number, because the mean of its divisors is an integer number (16440732).

Almost surely, 2^64979953 is an apocalyptic number.

It is an amenable number.

64979953 is a deficient number, since it is larger than the sum of its proper divisors (782975).

64979953 is an equidigital number, since it uses as much as digits as its factorization.

64979953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782974.

The product of its digits is 1837080, while the sum is 52.

The square root of 64979953 is about 8061.0143902613. The cubic root of 64979953 is about 402.0312364860.

The spelling of 64979953 in words is "sixty-four million, nine hundred seventy-nine thousand, nine hundred fifty-three".