91792109 has 2 divisors, whose sum is σ = 91792110. Its totient is φ = 91792108.

The previous prime is 91792087. The next prime is 91792111. The reversal of 91792109 is 90129719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89680900 + 2111209 = 9470^2 + 1453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91792109 is a prime.

Together with 91792111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91792139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45896054 + 45896055.

It is an arithmetic number, because the mean of its divisors is an integer number (45896055).

Almost surely, 2^91792109 is an apocalyptic number.

It is an amenable number.

91792109 is a deficient number, since it is larger than the sum of its proper divisors (1).

91792109 is an equidigital number, since it uses as much as digits as its factorization.

91792109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 91792109 is about 9580.8198500963. The cubic root of 91792109 is about 451.0954529420.

The spelling of 91792109 in words is "ninety-one million, seven hundred ninety-two thousand, one hundred nine".