2597489987 has 2 divisors, whose sum is σ = 2597489988. Its totient is φ = 2597489986.

The previous prime is 2597489977. The next prime is 2597490011. The reversal of 2597489987 is 7899847952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2597489987 - 2⁴ = 2597489971 is a prime.

It is not a weakly prime, because it can be changed into another prime (2597489957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298744993 + 1298744994.

It is an arithmetic number, because the mean of its divisors is an integer number (1298744994).

Almost surely, 2^2597489987 is an apocalyptic number.

2597489987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2597489987 is an equidigital number, since it uses as much as digits as its factorization.

2597489987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 68.

The square root of 2597489987 is about 50965.5764904116. The cubic root of 2597489987 is about 1374.6262322036.

The spelling of 2597489987 in words is "two billion, five hundred ninety-seven million, four hundred eighty-nine thousand, nine hundred eighty-seven".