911312891 has 2 divisors, whose sum is σ = 911312892. Its totient is φ = 911312890.

The previous prime is 911312887. The next prime is 911312911. The reversal of 911312891 is 198213119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 911312891 - 2² = 911312887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (911312851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455656445 + 455656446.

It is an arithmetic number, because the mean of its divisors is an integer number (455656446).

Almost surely, 2^911312891 is an apocalyptic number.

911312891 is a deficient number, since it is larger than the sum of its proper divisors (1).

911312891 is an equidigital number, since it uses as much as digits as its factorization.

911312891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 35.

The square root of 911312891 is about 30187.9593712460. The cubic root of 911312891 is about 969.5179136312.

The spelling of 911312891 in words is "nine hundred eleven million, three hundred twelve thousand, eight hundred ninety-one".