2505904139 has 2 divisors, whose sum is σ = 2505904140. Its totient is φ = 2505904138.

The previous prime is 2505904067. The next prime is 2505904151. The reversal of 2505904139 is 9314095052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2505904139 - 2¹⁶ = 2505838603 is a prime.

It is not a weakly prime, because it can be changed into another prime (2505904199) 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 as a sum of consecutive naturals, namely, 1252952069 + 1252952070.

It is an arithmetic number, because the mean of its divisors is an integer number (1252952070).

Almost surely, 2^2505904139 is an apocalyptic number.

2505904139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505904139 is an equidigital number, since it uses as much as digits as its factorization.

2505904139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 2505904139 is about 50059.0065722443. The cubic root of 2505904139 is about 1358.2763882468.

The spelling of 2505904139 in words is "two billion, five hundred five million, nine hundred four thousand, one hundred thirty-nine".