64722739 has 2 divisors, whose sum is σ = 64722740. Its totient is φ = 64722738.

The previous prime is 64722733. The next prime is 64722767. The reversal of 64722739 is 93722746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64722739 - 2¹³ = 64714547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64722733) 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, 32361369 + 32361370.

It is an arithmetic number, because the mean of its divisors is an integer number (32361370).

Almost surely, 2^64722739 is an apocalyptic number.

64722739 is a deficient number, since it is larger than the sum of its proper divisors (1).

64722739 is an equidigital number, since it uses as much as digits as its factorization.

64722739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 40.

The square root of 64722739 is about 8045.0443752661. The cubic root of 64722739 is about 401.5000736652.

The spelling of 64722739 in words is "sixty-four million, seven hundred twenty-two thousand, seven hundred thirty-nine".