2500687549 has 2 divisors, whose sum is σ = 2500687550. Its totient is φ = 2500687548.

The previous prime is 2500687529. The next prime is 2500687561. The reversal of 2500687549 is 9457860052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1955231524 + 545456025 = 44218^2 + 23355^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500687549 - 2¹¹ = 2500685501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2500687499 and 2500687508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2500687529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250343774 + 1250343775.

It is an arithmetic number, because the mean of its divisors is an integer number (1250343775).

Almost surely, 2^2500687549 is an apocalyptic number.

It is an amenable number.

2500687549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500687549 is an equidigital number, since it uses as much as digits as its factorization.

2500687549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 2500687549 is about 50006.8750173414. The cubic root of 2500687549 is about 1357.3332165678. Note that the first 3 decimals are identical.

The spelling of 2500687549 in words is "two billion, five hundred million, six hundred eighty-seven thousand, five hundred forty-nine".