2649599987 has 2 divisors, whose sum is σ = 2649599988. Its totient is φ = 2649599986.

The previous prime is 2649599947. The next prime is 2649600029. The reversal of 2649599987 is 7899959462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2649599987 - 2⁸ = 2649599731 is a prime.

It is a super-2 number, since 2×2649599987² = 14040760182220800338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2649599917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324799993 + 1324799994.

It is an arithmetic number, because the mean of its divisors is an integer number (1324799994).

Almost surely, 2^2649599987 is an apocalyptic number.

2649599987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649599987 is an equidigital number, since it uses as much as digits as its factorization.

2649599987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88179840, while the sum is 68.

The square root of 2649599987 is about 51474.2652885886. The cubic root of 2649599987 is about 1383.7578713368.

The spelling of 2649599987 in words is "two billion, six hundred forty-nine million, five hundred ninety-nine thousand, nine hundred eighty-seven".