31990453 has 8 divisors (see below), whose sum is σ = 35028000. Its totient is φ = 28974480.

The previous prime is 31990421. The next prime is 31990487. The reversal of 31990453 is 35409913.

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 31990453 - 2⁵ = 31990421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31490453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2203 + ... + 8296.

It is an arithmetic number, because the mean of its divisors is an integer number (4378500).

Almost surely, 2^31990453 is an apocalyptic number.

It is an amenable number.

31990453 is a deficient number, since it is larger than the sum of its proper divisors (3037547).

31990453 is a wasteful number, since it uses less digits than its factorization.

31990453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10787.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 31990453 is about 5656.0103429891. The cubic root of 31990453 is about 317.4486345078.

The spelling of 31990453 in words is "thirty-one million, nine hundred ninety thousand, four hundred fifty-three".