64722293 has 2 divisors, whose sum is σ = 64722294. Its totient is φ = 64722292.

The previous prime is 64722271. The next prime is 64722319. The reversal of 64722293 is 39222746.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37920964 + 26801329 = 6158^2 + 5177^2 .

It is a cyclic number.

It is not a de Polignac number, because 64722293 - 2¹² = 64718197 is a prime.

It is a super-2 number, since 2×64722293² = 8377950422355698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64722263) 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, 32361146 + 32361147.

It is an arithmetic number, because the mean of its divisors is an integer number (32361147).

Almost surely, 2^64722293 is an apocalyptic number.

It is an amenable number.

64722293 is a deficient number, since it is larger than the sum of its proper divisors (1).

64722293 is an equidigital number, since it uses as much as digits as its factorization.

64722293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 64722293 is about 8045.0166562910. The cubic root of 64722293 is about 401.4991514265.

The spelling of 64722293 in words is "sixty-four million, seven hundred twenty-two thousand, two hundred ninety-three".