2539687 has 4 divisors (see below), whose sum is σ = 2553040. Its totient is φ = 2526336.

The previous prime is 2539661. The next prime is 2539699. The reversal of 2539687 is 7869352.

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 2539687 - 2¹⁵ = 2506919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539627) 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, 6387 + ... + 6772.

It is an arithmetic number, because the mean of its divisors is an integer number (638260).

2^2539687 is an apocalyptic number.

2539687 is a deficient number, since it is larger than the sum of its proper divisors (13353).

2539687 is a wasteful number, since it uses less digits than its factorization.

2539687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352.

The product of its digits is 90720, while the sum is 40.

The square root of 2539687 is about 1593.6395451921. The cubic root of 2539687 is about 136.4352942839.

The spelling of 2539687 in words is "two million, five hundred thirty-nine thousand, six hundred eighty-seven".