64091057 has 2 divisors, whose sum is σ = 64091058. Its totient is φ = 64091056.

The previous prime is 64091021. The next prime is 64091089. The reversal of 64091057 is 75019046.

It is a happy number.

It is an a-pointer prime, because the next prime (64091089) can be obtained adding 64091057 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42198016 + 21893041 = 6496^2 + 4679^2 .

It is a cyclic number.

It is not a de Polignac number, because 64091057 - 2²⁴ = 47313841 is a prime.

It is a Chen prime.

It is equal to p_3790148 and since 64091057 and 3790148 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (64091017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32045528 + 32045529.

It is an arithmetic number, because the mean of its divisors is an integer number (32045529).

Almost surely, 2^64091057 is an apocalyptic number.

It is an amenable number.

64091057 is a deficient number, since it is larger than the sum of its proper divisors (1).

64091057 is an equidigital number, since it uses as much as digits as its factorization.

64091057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 64091057 is about 8005.6890396767. The cubic root of 64091057 is about 400.1896121872.

The spelling of 64091057 in words is "sixty-four million, ninety-one thousand, fifty-seven".