31948117 has 4 divisors (see below), whose sum is σ = 33827436. Its totient is φ = 30068800.

The previous prime is 31948069. The next prime is 31948121. The reversal of 31948117 is 71184913.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29495761 + 2452356 = 5431^2 + 1566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31948117 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 (31942117) 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, 939634 + ... + 939667.

It is an arithmetic number, because the mean of its divisors is an integer number (8456859).

Almost surely, 2^31948117 is an apocalyptic number.

It is an amenable number.

31948117 is a deficient number, since it is larger than the sum of its proper divisors (1879319).

31948117 is a wasteful number, since it uses less digits than its factorization.

31948117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879318.

The product of its digits is 6048, while the sum is 34.

The square root of 31948117 is about 5652.2665365320. The cubic root of 31948117 is about 317.3085360609.

It can be divided in two parts, 3194 and 8117, that added together give a palindrome (11311).

The spelling of 31948117 in words is "thirty-one million, nine hundred forty-eight thousand, one hundred seventeen".