31119399 has 12 divisors (see below), whose sum is σ = 45097936. Its totient is φ = 20678112.

The previous prime is 31119383. The next prime is 31119433. The reversal of 31119399 is 99391113.

It is not a de Polignac number, because 31119399 - 2⁴ = 31119383 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31119379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2707 + ... + 8340.

Almost surely, 2^31119399 is an apocalyptic number.

31119399 is a deficient number, since it is larger than the sum of its proper divisors (13978537).

31119399 is a wasteful number, since it uses less digits than its factorization.

31119399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11366 (or 11363 counting only the distinct ones).

The product of its digits is 6561, while the sum is 36.

The square root of 31119399 is about 5578.4764048977. The cubic root of 31119399 is about 314.5408579154.

The spelling of 31119399 in words is "thirty-one million, one hundred nineteen thousand, three hundred ninety-nine".