2506890391 has 2 divisors, whose sum is σ = 2506890392. Its totient is φ = 2506890390.

The previous prime is 2506890349. The next prime is 2506890443. The reversal of 2506890391 is 1930986052.

It is a happy number.

2506890391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2506890391 - 2²³ = 2498501783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2506890691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253445195 + 1253445196.

It is an arithmetic number, because the mean of its divisors is an integer number (1253445196).

Almost surely, 2^2506890391 is an apocalyptic number.

2506890391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506890391 is an equidigital number, since it uses as much as digits as its factorization.

2506890391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 2506890391 is about 50068.8564978271. The cubic root of 2506890391 is about 1358.4545577517.

The spelling of 2506890391 in words is "two billion, five hundred six million, eight hundred ninety thousand, three hundred ninety-one".