91627691 has 2 divisors, whose sum is σ = 91627692. Its totient is φ = 91627690.

The previous prime is 91627681. The next prime is 91627693. The reversal of 91627691 is 19672619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91627691 - 2¹⁴ = 91611307 is a prime.

Together with 91627693, 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 (91627693) 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, 45813845 + 45813846.

It is an arithmetic number, because the mean of its divisors is an integer number (45813846).

Almost surely, 2^91627691 is an apocalyptic number.

91627691 is a deficient number, since it is larger than the sum of its proper divisors (1).

91627691 is an equidigital number, since it uses as much as digits as its factorization.

91627691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 91627691 is about 9572.2354233481. The cubic root of 91627691 is about 450.8259579550.

The spelling of 91627691 in words is "ninety-one million, six hundred twenty-seven thousand, six hundred ninety-one".