64624169 has 2 divisors, whose sum is σ = 64624170. Its totient is φ = 64624168.

The previous prime is 64624139. The next prime is 64624177. The reversal of 64624169 is 96142646.

It is a happy number.

64624169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52374169 + 12250000 = 7237^2 + 3500^2 .

It is a cyclic number.

It is not a de Polignac number, because 64624169 - 2¹⁶ = 64558633 is a prime.

It is a super-2 number, since 2×64624169² = 8352566437881122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64624139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32312084 + 32312085.

It is an arithmetic number, because the mean of its divisors is an integer number (32312085).

Almost surely, 2^64624169 is an apocalyptic number.

It is an amenable number.

64624169 is a deficient number, since it is larger than the sum of its proper divisors (1).

64624169 is an equidigital number, since it uses as much as digits as its factorization.

64624169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 64624169 is about 8038.9159094992. The cubic root of 64624169 is about 401.2961475506.

The spelling of 64624169 in words is "sixty-four million, six hundred twenty-four thousand, one hundred sixty-nine".