2539369961 has 2 divisors, whose sum is σ = 2539369962. Its totient is φ = 2539369960.

The previous prime is 2539369879. The next prime is 2539370069. The reversal of 2539369961 is 1699639352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1774515625 + 764854336 = 42125^2 + 27656^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539369961 - 2²⁶ = 2472261097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2539369661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269684980 + 1269684981.

It is an arithmetic number, because the mean of its divisors is an integer number (1269684981).

Almost surely, 2^2539369961 is an apocalyptic number.

It is an amenable number.

2539369961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539369961 is an equidigital number, since it uses as much as digits as its factorization.

2539369961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2361960, while the sum is 53.

The square root of 2539369961 is about 50392.1617019949. The cubic root of 2539369961 is about 1364.2961679829.

The spelling of 2539369961 in words is "two billion, five hundred thirty-nine million, three hundred sixty-nine thousand, nine hundred sixty-one".