64813797 has 8 divisors (see below), whose sum is σ = 96020480. Its totient is φ = 43209180.

The previous prime is 64813789. The next prime is 64813813. The reversal of 64813797 is 79731846.

It is not a de Polignac number, because 64813797 - 2³ = 64813789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64813717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200229 + ... + 1200282.

It is an arithmetic number, because the mean of its divisors is an integer number (12002560).

Almost surely, 2^64813797 is an apocalyptic number.

It is an amenable number.

64813797 is a deficient number, since it is larger than the sum of its proper divisors (31206683).

64813797 is a wasteful number, since it uses less digits than its factorization.

64813797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400520 (or 2400514 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 64813797 is about 8050.7016464405. The cubic root of 64813797 is about 401.6882747128.

The spelling of 64813797 in words is "sixty-four million, eight hundred thirteen thousand, seven hundred ninety-seven".