64622969 has 2 divisors, whose sum is σ = 64622970. Its totient is φ = 64622968.

The previous prime is 64622951. The next prime is 64622977. The reversal of 64622969 is 96922646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33408400 + 31214569 = 5780^2 + 5587^2 .

It is a cyclic number.

It is not a de Polignac number, because 64622969 - 2²⁴ = 47845753 is a prime.

It is a super-2 number, since 2×64622969² = 8352256244749922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64622069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311484 + 32311485.

It is an arithmetic number, because the mean of its divisors is an integer number (32311485).

Almost surely, 2^64622969 is an apocalyptic number.

It is an amenable number.

64622969 is a deficient number, since it is larger than the sum of its proper divisors (1).

64622969 is an equidigital number, since it uses as much as digits as its factorization.

64622969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 44.

The square root of 64622969 is about 8038.8412722233. The cubic root of 64622969 is about 401.2936636587.

The spelling of 64622969 in words is "sixty-four million, six hundred twenty-two thousand, nine hundred sixty-nine".