9291314891 has 2 divisors, whose sum is σ = 9291314892. Its totient is φ = 9291314890.

The previous prime is 9291314869. The next prime is 9291314911. The reversal of 9291314891 is 1984131929.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9291314891 is a prime.

It is not a weakly prime, because it can be changed into another prime (9291314821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4645657445 + 4645657446.

It is an arithmetic number, because the mean of its divisors is an integer number (4645657446).

Almost surely, 2^9291314891 is an apocalyptic number.

9291314891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9291314891 is an equidigital number, since it uses as much as digits as its factorization.

9291314891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 47.

The square root of 9291314891 is about 96391.4668993060. The cubic root of 9291314891 is about 2102.2888793278.

The spelling of 9291314891 in words is "nine billion, two hundred ninety-one million, three hundred fourteen thousand, eight hundred ninety-one".