64907189 has 2 divisors, whose sum is σ = 64907190. Its totient is φ = 64907188.

The previous prime is 64907179. The next prime is 64907197. The reversal of 64907189 is 98170946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63840100 + 1067089 = 7990^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 64907189 - 2¹⁶ = 64841653 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 (64907159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32453594 + 32453595.

It is an arithmetic number, because the mean of its divisors is an integer number (32453595).

Almost surely, 2^64907189 is an apocalyptic number.

It is an amenable number.

64907189 is a deficient number, since it is larger than the sum of its proper divisors (1).

64907189 is an equidigital number, since it uses as much as digits as its factorization.

64907189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 64907189 is about 8056.4997982995. The cubic root of 64907189 is about 401.8811167153.

The spelling of 64907189 in words is "sixty-four million, nine hundred seven thousand, one hundred eighty-nine".