2312301991 has 2 divisors, whose sum is σ = 2312301992. Its totient is φ = 2312301990.

The previous prime is 2312301989. The next prime is 2312302001. The reversal of 2312301991 is 1991032132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2312301991 - 2¹ = 2312301989 is a prime.

Together with 2312301989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2312301961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156150995 + 1156150996.

It is an arithmetic number, because the mean of its divisors is an integer number (1156150996).

Almost surely, 2^2312301991 is an apocalyptic number.

2312301991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312301991 is an equidigital number, since it uses as much as digits as its factorization.

2312301991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 2312301991 is about 48086.4013105576. The cubic root of 2312301991 is about 1322.3553735663.

The spelling of 2312301991 in words is "two billion, three hundred twelve million, three hundred one thousand, nine hundred ninety-one".