91904867 has 2 divisors, whose sum is σ = 91904868. Its totient is φ = 91904866.

The previous prime is 91904861. The next prime is 91904927. The reversal of 91904867 is 76840919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91904867 - 2⁴ = 91904851 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91904861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45952433 + 45952434.

It is an arithmetic number, because the mean of its divisors is an integer number (45952434).

Almost surely, 2^91904867 is an apocalyptic number.

91904867 is a deficient number, since it is larger than the sum of its proper divisors (1).

91904867 is an equidigital number, since it uses as much as digits as its factorization.

91904867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 91904867 is about 9586.7026135163. The cubic root of 91904867 is about 451.2800868514.

The spelling of 91904867 in words is "ninety-one million, nine hundred four thousand, eight hundred sixty-seven".