31669117 has 4 divisors (see below), whose sum is σ = 32342976. Its totient is φ = 30995260.

The previous prime is 31669103. The next prime is 31669139. The reversal of 31669117 is 71196613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71196613 = 5399 ⋅13187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31669117 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 (31661117) 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, 336859 + ... + 336952.

It is an arithmetic number, because the mean of its divisors is an integer number (8085744).

Almost surely, 2^31669117 is an apocalyptic number.

It is an amenable number.

31669117 is a deficient number, since it is larger than the sum of its proper divisors (673859).

31669117 is an equidigital number, since it uses as much as digits as its factorization.

31669117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673858.

The product of its digits is 6804, while the sum is 34.

The square root of 31669117 is about 5627.5320523299. The cubic root of 31669117 is about 316.3821586195.

The spelling of 31669117 in words is "thirty-one million, six hundred sixty-nine thousand, one hundred seventeen".