91325947 has 2 divisors, whose sum is σ = 91325948. Its totient is φ = 91325946.

The previous prime is 91325929. The next prime is 91325957. The reversal of 91325947 is 74952319.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91325947 is a prime.

It is not a weakly prime, because it can be changed into another prime (91325957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45662973 + 45662974.

It is an arithmetic number, because the mean of its divisors is an integer number (45662974).

Almost surely, 2^91325947 is an apocalyptic number.

91325947 is a deficient number, since it is larger than the sum of its proper divisors (1).

91325947 is an equidigital number, since it uses as much as digits as its factorization.

91325947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 91325947 is about 9556.4610081348. The cubic root of 91325947 is about 450.3305341113.

The spelling of 91325947 in words is "ninety-one million, three hundred twenty-five thousand, nine hundred forty-seven".