2539694897 has 2 divisors, whose sum is σ = 2539694898. Its totient is φ = 2539694896.

The previous prime is 2539694887. The next prime is 2539694909. The reversal of 2539694897 is 7984969352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2042226481 + 497468416 = 45191^2 + 22304^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539694897 - 2¹² = 2539690801 is a prime.

It is not a weakly prime, because it can be changed into another prime (2539694827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269847448 + 1269847449.

It is an arithmetic number, because the mean of its divisors is an integer number (1269847449).

Almost surely, 2^2539694897 is an apocalyptic number.

It is an amenable number.

2539694897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539694897 is an equidigital number, since it uses as much as digits as its factorization.

2539694897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 62.

The square root of 2539694897 is about 50395.3856717061. The cubic root of 2539694897 is about 1364.3543569614.

The spelling of 2539694897 in words is "two billion, five hundred thirty-nine million, six hundred ninety-four thousand, eight hundred ninety-seven".