31899494 has 8 divisors (see below), whose sum is σ = 52199208. Its totient is φ = 14499760.

The previous prime is 31899493. The next prime is 31899521. The reversal of 31899494 is 49499813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31899493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724967 + ... + 725010.

It is an arithmetic number, because the mean of its divisors is an integer number (6524901).

Almost surely, 2^31899494 is an apocalyptic number.

31899494 is a deficient number, since it is larger than the sum of its proper divisors (20299714).

31899494 is a wasteful number, since it uses less digits than its factorization.

31899494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449990.

The product of its digits is 279936, while the sum is 47.

The square root of 31899494 is about 5647.9637038494. The cubic root of 31899494 is about 317.1474798643.

The spelling of 31899494 in words is "thirty-one million, eight hundred ninety-nine thousand, four hundred ninety-four".