79611647 has 2 divisors, whose sum is σ = 79611648. Its totient is φ = 79611646.

The previous prime is 79611643. The next prime is 79611667. The reversal of 79611647 is 74611697.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79611647 - 2² = 79611643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79611643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39805823 + 39805824.

It is an arithmetic number, because the mean of its divisors is an integer number (39805824).

Almost surely, 2^79611647 is an apocalyptic number.

79611647 is a deficient number, since it is larger than the sum of its proper divisors (1).

79611647 is an equidigital number, since it uses as much as digits as its factorization.

79611647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 79611647 is about 8922.5359063441. The cubic root of 79611647 is about 430.1885724202.

The spelling of 79611647 in words is "seventy-nine million, six hundred eleven thousand, six hundred forty-seven".