2136815987 has 2 divisors, whose sum is σ = 2136815988. Its totient is φ = 2136815986.

The previous prime is 2136815977. The next prime is 2136816013. The reversal of 2136815987 is 7895186312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2136815987 - 2¹² = 2136811891 is a prime.

It is not a weakly prime, because it can be changed into another prime (2136815927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068407993 + 1068407994.

It is an arithmetic number, because the mean of its divisors is an integer number (1068407994).

Almost surely, 2^2136815987 is an apocalyptic number.

2136815987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136815987 is an equidigital number, since it uses as much as digits as its factorization.

2136815987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 2136815987 is about 46225.7069929709. The cubic root of 2136815987 is about 1288.0193121968.

The spelling of 2136815987 in words is "two billion, one hundred thirty-six million, eight hundred fifteen thousand, nine hundred eighty-seven".