31090943 has 8 divisors (see below), whose sum is σ = 35452368. Its totient is φ = 27010944.

The previous prime is 31090937. The next prime is 31090951. The reversal of 31090943 is 34909013.

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 31090943 - 2⁶ = 31090879 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 (31090903) 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 7 ways as a sum of consecutive naturals, for example, 70121 + ... + 70562.

It is an arithmetic number, because the mean of its divisors is an integer number (4431546).

Almost surely, 2^31090943 is an apocalyptic number.

31090943 is a deficient number, since it is larger than the sum of its proper divisors (4361425).

31090943 is a wasteful number, since it uses less digits than its factorization.

31090943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140713.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 31090943 is about 5575.9253043777. The cubic root of 31090943 is about 314.4449552041. Note that the first 3 decimals are identical.

Adding to 31090943 its reverse (34909013), we get a palindrome (65999956).

The spelling of 31090943 in words is "thirty-one million, ninety thousand, nine hundred forty-three".