79415779 has 2 divisors, whose sum is σ = 79415780. Its totient is φ = 79415778.

The previous prime is 79415773. The next prime is 79415851. The reversal of 79415779 is 97751497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79415779 - 2⁵ = 79415747 is a prime.

It is not a weakly prime, because it can be changed into another prime (79415773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39707889 + 39707890.

It is an arithmetic number, because the mean of its divisors is an integer number (39707890).

Almost surely, 2^79415779 is an apocalyptic number.

79415779 is a deficient number, since it is larger than the sum of its proper divisors (1).

79415779 is an equidigital number, since it uses as much as digits as its factorization.

79415779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 555660, while the sum is 49.

The square root of 79415779 is about 8911.5531194063. The cubic root of 79415779 is about 429.8354860119.

The spelling of 79415779 in words is "seventy-nine million, four hundred fifteen thousand, seven hundred seventy-nine".