2599120989 has 12 divisors (see below), whose sum is σ = 3756723516. Its totient is φ = 1731622272.

The previous prime is 2599120949. The next prime is 2599121047. The reversal of 2599120989 is 9890219952.

It can be written as a sum of positive squares in 2 ways, for example, as 1632968100 + 966152889 = 40410^2 + 31083^2 .

It is not a de Polignac number, because 2599120989 - 2¹³ = 2599112797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2599120949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79002 + ... + 106955.

It is an arithmetic number, because the mean of its divisors is an integer number (313060293).

Almost surely, 2^2599120989 is an apocalyptic number.

It is an amenable number.

2599120989 is a deficient number, since it is larger than the sum of its proper divisors (1157602527).

2599120989 is a wasteful number, since it uses less digits than its factorization.

2599120989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187516 (or 187513 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 2599120989 is about 50981.5749952863. The cubic root of 2599120989 is about 1374.9138879846.

The spelling of 2599120989 in words is "two billion, five hundred ninety-nine million, one hundred twenty thousand, nine hundred eighty-nine".