64477331 has 2 divisors, whose sum is σ = 64477332. Its totient is φ = 64477330.

The previous prime is 64477327. The next prime is 64477337. The reversal of 64477331 is 13377446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64477331 - 2² = 64477327 is a prime.

It is a super-2 number, since 2×64477331² = 8314652425767122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64477291 and 64477300.

It is not a weakly prime, because it can be changed into another prime (64477337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32238665 + 32238666.

It is an arithmetic number, because the mean of its divisors is an integer number (32238666).

Almost surely, 2^64477331 is an apocalyptic number.

64477331 is a deficient number, since it is larger than the sum of its proper divisors (1).

64477331 is an equidigital number, since it uses as much as digits as its factorization.

64477331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 35.

The square root of 64477331 is about 8029.7777677841. Note that the first 4 decimals coincide. The cubic root of 64477331 is about 400.9919775013.

The spelling of 64477331 in words is "sixty-four million, four hundred seventy-seven thousand, three hundred thirty-one".