315115123987 has 2 divisors, whose sum is σ = 315115123988. Its totient is φ = 315115123986.

The previous prime is 315115123979. The next prime is 315115124047. The reversal of 315115123987 is 789321511513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315115123987 - 2³ = 315115123979 is a prime.

It is not a weakly prime, because it can be changed into another prime (315115126987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157557561993 + 157557561994.

It is an arithmetic number, because the mean of its divisors is an integer number (157557561994).

Almost surely, 2^315115123987 is an apocalyptic number.

315115123987 is a deficient number, since it is larger than the sum of its proper divisors (1).

315115123987 is an equidigital number, since it uses as much as digits as its factorization.

315115123987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 46.

The spelling of 315115123987 in words is "three hundred fifteen billion, one hundred fifteen million, one hundred twenty-three thousand, nine hundred eighty-seven".