2312129987 has 2 divisors, whose sum is σ = 2312129988. Its totient is φ = 2312129986.

The previous prime is 2312129983. The next prime is 2312130013. The reversal of 2312129987 is 7899212132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2312129987 - 2² = 2312129983 is a prime.

It is not a weakly prime, because it can be changed into another prime (2312129983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156064993 + 1156064994.

It is an arithmetic number, because the mean of its divisors is an integer number (1156064994).

Almost surely, 2^2312129987 is an apocalyptic number.

2312129987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312129987 is an equidigital number, since it uses as much as digits as its factorization.

2312129987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 2312129987 is about 48084.6127882923. The cubic root of 2312129987 is about 1322.3225843005.

The spelling of 2312129987 in words is "two billion, three hundred twelve million, one hundred twenty-nine thousand, nine hundred eighty-seven".