64973375 has 8 divisors (see below), whose sum is σ = 81086928. Its totient is φ = 51978600.

The previous prime is 64973347. The next prime is 64973393. The reversal of 64973375 is 57337946.

It is not a de Polignac number, because 64973375 - 2¹² = 64969279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259769 + ... + 260018.

It is an arithmetic number, because the mean of its divisors is an integer number (10135866).

Almost surely, 2^64973375 is an apocalyptic number.

64973375 is a deficient number, since it is larger than the sum of its proper divisors (16113553).

64973375 is an equidigital number, since it uses as much as digits as its factorization.

64973375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519802 (or 519792 counting only the distinct ones).

The product of its digits is 476280, while the sum is 44.

The square root of 64973375 is about 8060.6063667692. The cubic root of 64973375 is about 402.0176699905.

The spelling of 64973375 in words is "sixty-four million, nine hundred seventy-three thousand, three hundred seventy-five".