91558427 has 2 divisors, whose sum is σ = 91558428. Its totient is φ = 91558426.

The previous prime is 91558409. The next prime is 91558429. The reversal of 91558427 is 72485519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91558427 - 2⁸ = 91558171 is a prime.

Together with 91558429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91558429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45779213 + 45779214.

It is an arithmetic number, because the mean of its divisors is an integer number (45779214).

Almost surely, 2^91558427 is an apocalyptic number.

91558427 is a deficient number, since it is larger than the sum of its proper divisors (1).

91558427 is an equidigital number, since it uses as much as digits as its factorization.

91558427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 91558427 is about 9568.6167756892. The cubic root of 91558427 is about 450.7123318946.

The spelling of 91558427 in words is "ninety-one million, five hundred fifty-eight thousand, four hundred twenty-seven".