64622977 has 2 divisors, whose sum is σ = 64622978. Its totient is φ = 64622976.

The previous prime is 64622969. The next prime is 64622983. The reversal of 64622977 is 77922646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63377521 + 1245456 = 7961^2 + 1116^2 .

It is a cyclic number.

It is not a de Polignac number, because 64622977 - 2³ = 64622969 is a prime.

It is a super-2 number, since 2×64622977² = 8352258312685058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64622177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311488 + 32311489.

It is an arithmetic number, because the mean of its divisors is an integer number (32311489).

Almost surely, 2^64622977 is an apocalyptic number.

It is an amenable number.

64622977 is a deficient number, since it is larger than the sum of its proper divisors (1).

64622977 is an equidigital number, since it uses as much as digits as its factorization.

64622977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 64622977 is about 8038.8417698074. The cubic root of 64622977 is about 401.2936802181.

The spelling of 64622977 in words is "sixty-four million, six hundred twenty-two thousand, nine hundred seventy-seven".