2599977949 has 2 divisors, whose sum is σ = 2599977950. Its totient is φ = 2599977948.

The previous prime is 2599977931. The next prime is 2599977959. The reversal of 2599977949 is 9497799952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2082096900 + 517881049 = 45630^2 + 22757^2 .

It is a cyclic number.

It is not a de Polignac number, because 2599977949 - 2²⁷ = 2465760221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2599977959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1299988974 + 1299988975.

It is an arithmetic number, because the mean of its divisors is an integer number (1299988975).

Almost surely, 2^2599977949 is an apocalyptic number.

It is an amenable number.

2599977949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2599977949 is an equidigital number, since it uses as much as digits as its factorization.

2599977949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115736040, while the sum is 70.

The square root of 2599977949 is about 50989.9789076246. The cubic root of 2599977949 is about 1375.0649796729.

The spelling of 2599977949 in words is "two billion, five hundred ninety-nine million, nine hundred seventy-seven thousand, nine hundred forty-nine".