2539694887 has 2 divisors, whose sum is σ = 2539694888. Its totient is φ = 2539694886.

The previous prime is 2539694849. The next prime is 2539694897. The reversal of 2539694887 is 7884969352.

2539694887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2539694887 - 2²³ = 2531306279 is a prime.

It is a congruent number.

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, 1269847443 + 1269847444.

It is an arithmetic number, because the mean of its divisors is an integer number (1269847444).

Almost surely, 2^2539694887 is an apocalyptic number.

2539694887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539694887 is an equidigital number, since it uses as much as digits as its factorization.

2539694887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 61.

The square root of 2539694887 is about 50395.3855724907. The cubic root of 2539694887 is about 1364.3543551707.

The spelling of 2539694887 in words is "two billion, five hundred thirty-nine million, six hundred ninety-four thousand, eight hundred eighty-seven".