31990299 has 8 divisors (see below), whose sum is σ = 46531392. Its totient is φ = 19388040.

The previous prime is 31990271. The next prime is 31990303. The reversal of 31990299 is 99209913.

It is a happy number.

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

It is not a de Polignac number, because 31990299 - 2⁵ = 31990267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31990299.

It is not an unprimeable number, because it can be changed into a prime (31990229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484669 + ... + 484734.

It is an arithmetic number, because the mean of its divisors is an integer number (5816424).

Almost surely, 2^31990299 is an apocalyptic number.

31990299 is a deficient number, since it is larger than the sum of its proper divisors (14541093).

31990299 is a wasteful number, since it uses less digits than its factorization.

31990299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969417.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 31990299 is about 5655.9967291363. The cubic root of 31990299 is about 317.4481251145.

The spelling of 31990299 in words is "thirty-one million, nine hundred ninety thousand, two hundred ninety-nine".