91904623 has 2 divisors, whose sum is σ = 91904624. Its totient is φ = 91904622.

The previous prime is 91904621. The next prime is 91904651. The reversal of 91904623 is 32640919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91904623 - 2¹ = 91904621 is a prime.

Together with 91904621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91904621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45952311 + 45952312.

It is an arithmetic number, because the mean of its divisors is an integer number (45952312).

Almost surely, 2^91904623 is an apocalyptic number.

91904623 is a deficient number, since it is larger than the sum of its proper divisors (1).

91904623 is an equidigital number, since it uses as much as digits as its factorization.

91904623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 91904623 is about 9586.6898875472. The cubic root of 91904623 is about 451.2796874804.

The spelling of 91904623 in words is "ninety-one million, nine hundred four thousand, six hundred twenty-three".