91405907 has 2 divisors, whose sum is σ = 91405908. Its totient is φ = 91405906.

The previous prime is 91405849. The next prime is 91405921. The reversal of 91405907 is 70950419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91405907 - 2¹⁴ = 91389523 is a prime.

It is not a weakly prime, because it can be changed into another prime (91405967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45702953 + 45702954.

It is an arithmetic number, because the mean of its divisors is an integer number (45702954).

Almost surely, 2^91405907 is an apocalyptic number.

91405907 is a deficient number, since it is larger than the sum of its proper divisors (1).

91405907 is an equidigital number, since it uses as much as digits as its factorization.

91405907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 91405907 is about 9560.6436498805. The cubic root of 91405907 is about 450.4619240277.

The spelling of 91405907 in words is "ninety-one million, four hundred five thousand, nine hundred seven".