79722739 has 2 divisors, whose sum is σ = 79722740. Its totient is φ = 79722738.

The previous prime is 79722691. The next prime is 79722749. The reversal of 79722739 is 93722797.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79722739 - 2⁷ = 79722611 is a prime.

It is a super-2 number, since 2×79722739² = 12711430227324242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79722749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39861369 + 39861370.

It is an arithmetic number, because the mean of its divisors is an integer number (39861370).

Almost surely, 2^79722739 is an apocalyptic number.

79722739 is a deficient number, since it is larger than the sum of its proper divisors (1).

79722739 is an equidigital number, since it uses as much as digits as its factorization.

79722739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 333396, while the sum is 46.

The square root of 79722739 is about 8928.7590963134. The cubic root of 79722739 is about 430.3885778991.

The spelling of 79722739 in words is "seventy-nine million, seven hundred twenty-two thousand, seven hundred thirty-nine".