2731042639 has 16 divisors (see below), whose sum is σ = 3156808032. Its totient is φ = 2340154368.

The previous prime is 2731042637. The next prime is 2731042649. The reversal of 2731042639 is 9362401372.

2731042639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2731042639 - 2¹ = 2731042637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2731042598 and 2731042607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731042637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68509 + ... + 100774.

It is an arithmetic number, because the mean of its divisors is an integer number (197300502).

Almost surely, 2^2731042639 is an apocalyptic number.

2731042639 is a deficient number, since it is larger than the sum of its proper divisors (425765393).

2731042639 is a wasteful number, since it uses less digits than its factorization.

2731042639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169386.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 2731042639 is about 52259.3784788912. The cubic root of 2731042639 is about 1397.7928894790.

The spelling of 2731042639 in words is "two billion, seven hundred thirty-one million, forty-two thousand, six hundred thirty-nine".