64623877 has 2 divisors, whose sum is σ = 64623878. Its totient is φ = 64623876.

The previous prime is 64623863. The next prime is 64623887. The reversal of 64623877 is 77832646.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60933636 + 3690241 = 7806^2 + 1921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64623877 is a prime.

It is a super-2 number, since 2×64623877² = 8352490957022258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64623847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311938 + 32311939.

It is an arithmetic number, because the mean of its divisors is an integer number (32311939).

Almost surely, 2^64623877 is an apocalyptic number.

It is an amenable number.

64623877 is a deficient number, since it is larger than the sum of its proper divisors (1).

64623877 is an equidigital number, since it uses as much as digits as its factorization.

64623877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 43.

The square root of 64623877 is about 8038.8977478259. The cubic root of 64623877 is about 401.2955431398.

The spelling of 64623877 in words is "sixty-four million, six hundred twenty-three thousand, eight hundred seventy-seven".