64672957 has 2 divisors, whose sum is σ = 64672958. Its totient is φ = 64672956.

The previous prime is 64672943. The next prime is 64672961. The reversal of 64672957 is 75927646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 20304036 = 6661^2 + 4506^2 .

It is a cyclic number.

It is not a de Polignac number, because 64672957 - 2¹¹ = 64670909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64673957) 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, 32336478 + 32336479.

It is an arithmetic number, because the mean of its divisors is an integer number (32336479).

Almost surely, 2^64672957 is an apocalyptic number.

It is an amenable number.

64672957 is a deficient number, since it is larger than the sum of its proper divisors (1).

64672957 is an equidigital number, since it uses as much as digits as its factorization.

64672957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 46.

The square root of 64672957 is about 8041.9498257574. The cubic root of 64672957 is about 401.3971082898.

The spelling of 64672957 in words is "sixty-four million, six hundred seventy-two thousand, nine hundred fifty-seven".