64258921 has 2 divisors, whose sum is σ = 64258922. Its totient is φ = 64258920.

The previous prime is 64258913. The next prime is 64258981. The reversal of 64258921 is 12985246.

64258921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36433296 + 27825625 = 6036^2 + 5275^2 .

It is a cyclic number.

It is not a de Polignac number, because 64258921 - 2³ = 64258913 is a prime.

It is not a weakly prime, because it can be changed into another prime (64258981) 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, 32129460 + 32129461.

It is an arithmetic number, because the mean of its divisors is an integer number (32129461).

Almost surely, 2^64258921 is an apocalyptic number.

It is an amenable number.

64258921 is a deficient number, since it is larger than the sum of its proper divisors (1).

64258921 is an equidigital number, since it uses as much as digits as its factorization.

64258921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 64258921 is about 8016.1662283164. The cubic root of 64258921 is about 400.5386929491.

The spelling of 64258921 in words is "sixty-four million, two hundred fifty-eight thousand, nine hundred twenty-one".