91330787 has 2 divisors, whose sum is σ = 91330788. Its totient is φ = 91330786.

The previous prime is 91330751. The next prime is 91330859. The reversal of 91330787 is 78703319.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91330787 - 2⁸ = 91330531 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91330787.

It is not a weakly prime, because it can be changed into another prime (91330487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45665393 + 45665394.

It is an arithmetic number, because the mean of its divisors is an integer number (45665394).

Almost surely, 2^91330787 is an apocalyptic number.

91330787 is a deficient number, since it is larger than the sum of its proper divisors (1).

91330787 is an equidigital number, since it uses as much as digits as its factorization.

91330787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 91330787 is about 9556.7142365983. The cubic root of 91330787 is about 450.3384893579.

The spelling of 91330787 in words is "ninety-one million, three hundred thirty thousand, seven hundred eighty-seven".