64920133 has 2 divisors, whose sum is σ = 64920134. Its totient is φ = 64920132.

The previous prime is 64920109. The next prime is 64920137. The reversal of 64920133 is 33102946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52969284 + 11950849 = 7278^2 + 3457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64920133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64920137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32460066 + 32460067.

It is an arithmetic number, because the mean of its divisors is an integer number (32460067).

Almost surely, 2^64920133 is an apocalyptic number.

It is an amenable number.

64920133 is a deficient number, since it is larger than the sum of its proper divisors (1).

64920133 is an equidigital number, since it uses as much as digits as its factorization.

64920133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 64920133 is about 8057.3030847797. The cubic root of 64920133 is about 401.9078297472.

The spelling of 64920133 in words is "sixty-four million, nine hundred twenty thousand, one hundred thirty-three".