64805973 has 32 divisors (see below), whose sum is σ = 93208320. Its totient is φ = 39959040.

The previous prime is 64805971. The next prime is 64805977. The reversal of 64805973 is 37950846.

It is a happy number.

It is not a de Polignac number, because 64805973 - 2¹ = 64805971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64805971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374515 + ... + 374687.

It is an arithmetic number, because the mean of its divisors is an integer number (2912760).

Almost surely, 2^64805973 is an apocalyptic number.

It is an amenable number.

64805973 is a deficient number, since it is larger than the sum of its proper divisors (28402347).

64805973 is a wasteful number, since it uses less digits than its factorization.

64805973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 64805973 is about 8050.2157113956. The cubic root of 64805973 is about 401.6721107905.

The spelling of 64805973 in words is "sixty-four million, eight hundred five thousand, nine hundred seventy-three".