91314787 has 2 divisors, whose sum is σ = 91314788. Its totient is φ = 91314786.

The previous prime is 91314781. The next prime is 91314791. The reversal of 91314787 is 78741319.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91314787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91314781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45657393 + 45657394.

It is an arithmetic number, because the mean of its divisors is an integer number (45657394).

Almost surely, 2^91314787 is an apocalyptic number.

91314787 is a deficient number, since it is larger than the sum of its proper divisors (1).

91314787 is an equidigital number, since it uses as much as digits as its factorization.

91314787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 40.

The square root of 91314787 is about 9555.8770921355. The cubic root of 91314787 is about 450.3121899508.

It can be divided in two parts, 913 and 14787, that multiplied together give a palindrome (13500531).

The spelling of 91314787 in words is "ninety-one million, three hundred fourteen thousand, seven hundred eighty-seven".