79216091 has 2 divisors, whose sum is σ = 79216092. Its totient is φ = 79216090.

The previous prime is 79216087. The next prime is 79216097. The reversal of 79216091 is 19061297.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79216091 - 2² = 79216087 is a prime.

It is not a weakly prime, because it can be changed into another prime (79216097) 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, 39608045 + 39608046.

It is an arithmetic number, because the mean of its divisors is an integer number (39608046).

Almost surely, 2^79216091 is an apocalyptic number.

79216091 is a deficient number, since it is larger than the sum of its proper divisors (1).

79216091 is an equidigital number, since it uses as much as digits as its factorization.

79216091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 79216091 is about 8900.3421844331. The cubic root of 79216091 is about 429.4749152221.

The spelling of 79216091 in words is "seventy-nine million, two hundred sixteen thousand, ninety-one".