2597427209 has 4 divisors (see below), whose sum is σ = 2797229316. Its totient is φ = 2397625104.

The previous prime is 2597427199. The next prime is 2597427211. The reversal of 2597427209 is 9027247952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 752295184 + 1845132025 = 27428^2 + 42955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2597427209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2597427109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99901034 + ... + 99901059.

It is an arithmetic number, because the mean of its divisors is an integer number (699307329).

Almost surely, 2^2597427209 is an apocalyptic number.

It is an amenable number.

2597427209 is a deficient number, since it is larger than the sum of its proper divisors (199802107).

2597427209 is a wasteful number, since it uses less digits than its factorization.

2597427209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199802106.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 2597427209 is about 50964.9606003968. The cubic root of 2597427209 is about 1374.6151577970.

The spelling of 2597427209 in words is "two billion, five hundred ninety-seven million, four hundred twenty-seven thousand, two hundred nine".