31990467 has 8 divisors (see below), whose sum is σ = 42716160. Its totient is φ = 21295880.

The previous prime is 31990421. The next prime is 31990487. The reversal of 31990467 is 76409913.

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

It is a cyclic number.

It is not a de Polignac number, because 31990467 - 2¹⁰ = 31989443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31990487) 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, 5259 + ... + 9572.

It is an arithmetic number, because the mean of its divisors is an integer number (5339520).

Almost surely, 2^31990467 is an apocalyptic number.

31990467 is a deficient number, since it is larger than the sum of its proper divisors (10725693).

31990467 is a wasteful number, since it uses less digits than its factorization.

31990467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15553.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 31990467 is about 5656.0115806105. The cubic root of 31990467 is about 317.4486808162.

The spelling of 31990467 in words is "thirty-one million, nine hundred ninety thousand, four hundred sixty-seven".