912390491 has 2 divisors, whose sum is σ = 912390492. Its totient is φ = 912390490.

The previous prime is 912390467. The next prime is 912390499. The reversal of 912390491 is 194093219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 912390491 - 2²² = 908196187 is a prime.

It is not a weakly prime, because it can be changed into another prime (912390499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456195245 + 456195246.

It is an arithmetic number, because the mean of its divisors is an integer number (456195246).

Almost surely, 2^912390491 is an apocalyptic number.

912390491 is a deficient number, since it is larger than the sum of its proper divisors (1).

912390491 is an equidigital number, since it uses as much as digits as its factorization.

912390491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 912390491 is about 30205.8022737354. The cubic root of 912390491 is about 969.8999050008.

The spelling of 912390491 in words is "nine hundred twelve million, three hundred ninety thousand, four hundred ninety-one".