64717291 has 2 divisors, whose sum is σ = 64717292. Its totient is φ = 64717290.

The previous prime is 64717267. The next prime is 64717309. The reversal of 64717291 is 19271746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64717291 - 2¹⁵ = 64684523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64717291.

It is not a weakly prime, because it can be changed into another prime (64717231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32358645 + 32358646.

It is an arithmetic number, because the mean of its divisors is an integer number (32358646).

Almost surely, 2^64717291 is an apocalyptic number.

64717291 is a deficient number, since it is larger than the sum of its proper divisors (1).

64717291 is an equidigital number, since it uses as much as digits as its factorization.

64717291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 64717291 is about 8044.7057746073. The cubic root of 64717291 is about 401.4888080018.

The spelling of 64717291 in words is "sixty-four million, seven hundred seventeen thousand, two hundred ninety-one".