91125907 has 2 divisors, whose sum is σ = 91125908. Its totient is φ = 91125906.

The previous prime is 91125893. The next prime is 91125911. The reversal of 91125907 is 70952119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91125907 - 2⁷ = 91125779 is a prime.

It is not a weakly prime, because it can be changed into another prime (91125607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45562953 + 45562954.

It is an arithmetic number, because the mean of its divisors is an integer number (45562954).

Almost surely, 2^91125907 is an apocalyptic number.

91125907 is a deficient number, since it is larger than the sum of its proper divisors (1).

91125907 is an equidigital number, since it uses as much as digits as its factorization.

91125907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 91125907 is about 9545.9890530002. The cubic root of 91125907 is about 450.0014929992.

The spelling of 91125907 in words is "ninety-one million, one hundred twenty-five thousand, nine hundred seven".