2039668731 has 6 divisors (see below), whose sum is σ = 2946188180. Its totient is φ = 1359779148.

The previous prime is 2039668723. The next prime is 2039668747. The reversal of 2039668731 is 1378669302.

It is not a de Polignac number, because 2039668731 - 2³ = 2039668723 is a prime.

It is a super-2 number, since 2×2039668731² = 8320497064438300722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2039668231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113314921 + ... + 113314938.

Almost surely, 2^2039668731 is an apocalyptic number.

2039668731 is a deficient number, since it is larger than the sum of its proper divisors (906519449).

2039668731 is a wasteful number, since it uses less digits than its factorization.

2039668731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226629865 (or 226629862 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 2039668731 is about 45162.6918041872. The cubic root of 2039668731 is about 1268.1964875364.

The spelling of 2039668731 in words is "two billion, thirty-nine million, six hundred sixty-eight thousand, seven hundred thirty-one".