2506991087 has 2 divisors, whose sum is σ = 2506991088. Its totient is φ = 2506991086.

The previous prime is 2506991033. The next prime is 2506991143. The reversal of 2506991087 is 7801996052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2506991087 - 2⁸ = 2506990831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2506991017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253495543 + 1253495544.

It is an arithmetic number, because the mean of its divisors is an integer number (1253495544).

Almost surely, 2^2506991087 is an apocalyptic number.

2506991087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506991087 is an equidigital number, since it uses as much as digits as its factorization.

2506991087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 2506991087 is about 50069.8620629216. The cubic root of 2506991087 is about 1358.4727461694.

The spelling of 2506991087 in words is "two billion, five hundred six million, nine hundred ninety-one thousand, eighty-seven".