64923557 has 2 divisors, whose sum is σ = 64923558. Its totient is φ = 64923556.

The previous prime is 64923539. The next prime is 64923563. The reversal of 64923557 is 75532946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 32273761 = 5714^2 + 5681^2 .

It is a cyclic number.

It is not a de Polignac number, because 64923557 - 2⁸ = 64923301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64923857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32461778 + 32461779.

It is an arithmetic number, because the mean of its divisors is an integer number (32461779).

Almost surely, 2^64923557 is an apocalyptic number.

It is an amenable number.

64923557 is a deficient number, since it is larger than the sum of its proper divisors (1).

64923557 is an equidigital number, since it uses as much as digits as its factorization.

64923557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 41.

The square root of 64923557 is about 8057.5155600222. The cubic root of 64923557 is about 401.9148953941.

The spelling of 64923557 in words is "sixty-four million, nine hundred twenty-three thousand, five hundred fifty-seven".