91377659 has 2 divisors, whose sum is σ = 91377660. Its totient is φ = 91377658.

The previous prime is 91377653. The next prime is 91377661. The reversal of 91377659 is 95677319.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (95677319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91377659 is a prime.

Together with 91377661, 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 (91377653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45688829 + 45688830.

It is an arithmetic number, because the mean of its divisors is an integer number (45688830).

Almost surely, 2^91377659 is an apocalyptic number.

91377659 is a deficient number, since it is larger than the sum of its proper divisors (1).

91377659 is an equidigital number, since it uses as much as digits as its factorization.

91377659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 47.

The square root of 91377659 is about 9559.1662293319. The cubic root of 91377659 is about 450.4155157962.

The spelling of 91377659 in words is "ninety-one million, three hundred seventy-seven thousand, six hundred fifty-nine".