1312100087 has 2 divisors, whose sum is σ = 1312100088. Its totient is φ = 1312100086.

The previous prime is 1312100077. The next prime is 1312100117. The reversal of 1312100087 is 7800012131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312100087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312100047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656050043 + 656050044.

It is an arithmetic number, because the mean of its divisors is an integer number (656050044).

Almost surely, 2^1312100087 is an apocalyptic number.

1312100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312100087 is an equidigital number, since it uses as much as digits as its factorization.

1312100087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 1312100087 is about 36222.9221212204. The cubic root of 1312100087 is about 1094.7685719845.

The spelling of 1312100087 in words is "one billion, three hundred twelve million, one hundred thousand, eighty-seven".