91672079 has 2 divisors, whose sum is σ = 91672080. Its totient is φ = 91672078.

The previous prime is 91672027. The next prime is 91672099. The reversal of 91672079 is 97027619.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91672079 - 2⁸ = 91671823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91672019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45836039 + 45836040.

It is an arithmetic number, because the mean of its divisors is an integer number (45836040).

Almost surely, 2^91672079 is an apocalyptic number.

91672079 is a deficient number, since it is larger than the sum of its proper divisors (1).

91672079 is an equidigital number, since it uses as much as digits as its factorization.

91672079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 91672079 is about 9574.5537232813. The cubic root of 91672079 is about 450.8987453838.

The spelling of 91672079 in words is "ninety-one million, six hundred seventy-two thousand, seventy-nine".