91119929 has 2 divisors, whose sum is σ = 91119930. Its totient is φ = 91119928.

The previous prime is 91119869. The next prime is 91119947. The reversal of 91119929 is 92991119.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60295225 + 30824704 = 7765^2 + 5552^2 .

It is a cyclic number.

It is not a de Polignac number, because 91119929 - 2⁸ = 91119673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91119979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45559964 + 45559965.

It is an arithmetic number, because the mean of its divisors is an integer number (45559965).

Almost surely, 2^91119929 is an apocalyptic number.

It is an amenable number.

91119929 is a deficient number, since it is larger than the sum of its proper divisors (1).

91119929 is an equidigital number, since it uses as much as digits as its factorization.

91119929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 41.

The square root of 91119929 is about 9545.6759320647. The cubic root of 91119929 is about 449.9916525201.

The spelling of 91119929 in words is "ninety-one million, one hundred nineteen thousand, nine hundred twenty-nine".