91916328947 has 2 divisors, whose sum is σ = 91916328948. Its totient is φ = 91916328946.

The previous prime is 91916328941. The next prime is 91916329031. The reversal of 91916328947 is 74982361919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91916328947 - 2¹⁴ = 91916312563 is a prime.

It is a super-2 number, since 2×91916328947² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91916328941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45958164473 + 45958164474.

It is an arithmetic number, because the mean of its divisors is an integer number (45958164474).

Almost surely, 2^91916328947 is an apocalyptic number.

91916328947 is a deficient number, since it is larger than the sum of its proper divisors (1).

91916328947 is an equidigital number, since it uses as much as digits as its factorization.

91916328947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The spelling of 91916328947 in words is "ninety-one billion, nine hundred sixteen million, three hundred twenty-eight thousand, nine hundred forty-seven".