79727663 has 2 divisors, whose sum is σ = 79727664. Its totient is φ = 79727662.

The previous prime is 79727647. The next prime is 79727737. The reversal of 79727663 is 36672797.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79727663 - 2⁴ = 79727647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79727623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39863831 + 39863832.

It is an arithmetic number, because the mean of its divisors is an integer number (39863832).

Almost surely, 2^79727663 is an apocalyptic number.

79727663 is a deficient number, since it is larger than the sum of its proper divisors (1).

79727663 is an equidigital number, since it uses as much as digits as its factorization.

79727663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 47.

The square root of 79727663 is about 8929.0348302602. The cubic root of 79727663 is about 430.3974385653.

The spelling of 79727663 in words is "seventy-nine million, seven hundred twenty-seven thousand, six hundred sixty-three".