912673991 has 2 divisors, whose sum is σ = 912673992. Its totient is φ = 912673990.

The previous prime is 912673969. The next prime is 912673997. The reversal of 912673991 is 199376219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 912673991 - 2²² = 908479687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (912673997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456336995 + 456336996.

It is an arithmetic number, because the mean of its divisors is an integer number (456336996).

Almost surely, 2^912673991 is an apocalyptic number.

912673991 is a deficient number, since it is larger than the sum of its proper divisors (1).

912673991 is an equidigital number, since it uses as much as digits as its factorization.

912673991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 47.

The square root of 912673991 is about 30210.4947162406. The cubic root of 912673991 is about 970.0003510822. Note that the first 3 decimals are identical.

The spelling of 912673991 in words is "nine hundred twelve million, six hundred seventy-three thousand, nine hundred ninety-one".