64719673 has 2 divisors, whose sum is σ = 64719674. Its totient is φ = 64719672.

The previous prime is 64719667. The next prime is 64719691. The reversal of 64719673 is 37691746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39287824 + 25431849 = 6268^2 + 5043^2 .

It is a cyclic number.

It is not a de Polignac number, because 64719673 - 2²⁵ = 31165241 is a prime.

It is not a weakly prime, because it can be changed into another prime (64719653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32359836 + 32359837.

It is an arithmetic number, because the mean of its divisors is an integer number (32359837).

Almost surely, 2^64719673 is an apocalyptic number.

It is an amenable number.

64719673 is a deficient number, since it is larger than the sum of its proper divisors (1).

64719673 is an equidigital number, since it uses as much as digits as its factorization.

64719673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The square root of 64719673 is about 8044.8538209218. The cubic root of 64719673 is about 401.4937337055.

The spelling of 64719673 in words is "sixty-four million, seven hundred nineteen thousand, six hundred seventy-three".