91919327 has 2 divisors, whose sum is σ = 91919328. Its totient is φ = 91919326.

The previous prime is 91919279. The next prime is 91919329. The reversal of 91919327 is 72391919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91919327 - 2⁸ = 91919071 is a prime.

It is a super-2 number, since 2×91919327² = 16898325352265858, which contains 22 as substring.

Together with 91919329, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91919329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45959663 + 45959664.

It is an arithmetic number, because the mean of its divisors is an integer number (45959664).

Almost surely, 2^91919327 is an apocalyptic number.

91919327 is a deficient number, since it is larger than the sum of its proper divisors (1).

91919327 is an equidigital number, since it uses as much as digits as its factorization.

91919327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 91919327 is about 9587.4567534879. The cubic root of 91919327 is about 451.3037532363.

The spelling of 91919327 in words is "ninety-one million, nine hundred nineteen thousand, three hundred twenty-seven".