2505923939 has 4 divisors (see below), whose sum is σ = 2508025656. Its totient is φ = 2503822224.

The previous prime is 2505923923. The next prime is 2505923941. The reversal of 2505923939 is 9393295052.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2505923939 - 2⁴ = 2505923923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2505923893 and 2505923902.

It is not an unprimeable number, because it can be changed into a prime (2505923039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049069 + ... + 1051454.

It is an arithmetic number, because the mean of its divisors is an integer number (627006414).

Almost surely, 2^2505923939 is an apocalyptic number.

2505923939 is a deficient number, since it is larger than the sum of its proper divisors (2101717).

2505923939 is a wasteful number, since it uses less digits than its factorization.

2505923939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101716.

The product of its (nonzero) digits is 656100, while the sum is 47.

The square root of 2505923939 is about 50059.2043384631. The cubic root of 2505923939 is about 1358.2799656384.

The spelling of 2505923939 in words is "two billion, five hundred five million, nine hundred twenty-three thousand, nine hundred thirty-nine".