91955911 has 2 divisors, whose sum is σ = 91955912. Its totient is φ = 91955910.

The previous prime is 91955891. The next prime is 91955933. The reversal of 91955911 is 11955919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91955911 - 2¹⁷ = 91824839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91955111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45977955 + 45977956.

It is an arithmetic number, because the mean of its divisors is an integer number (45977956).

Almost surely, 2^91955911 is an apocalyptic number.

91955911 is a deficient number, since it is larger than the sum of its proper divisors (1).

91955911 is an equidigital number, since it uses as much as digits as its factorization.

91955911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18225, while the sum is 40.

The square root of 91955911 is about 9589.3644732068. The cubic root of 91955911 is about 451.3636184360.

The spelling of 91955911 in words is "ninety-one million, nine hundred fifty-five thousand, nine hundred eleven".