31668197 has 8 divisors (see below), whose sum is σ = 34661952. Its totient is φ = 28693600.

The previous prime is 31668179. The next prime is 31668199. The reversal of 31668197 is 79186613.

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 31668197 - 2¹⁰ = 31667173 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 (31668199) 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, 1208 + ... + 8049.

It is an arithmetic number, because the mean of its divisors is an integer number (4332744).

Almost surely, 2^31668197 is an apocalyptic number.

It is an amenable number.

31668197 is a deficient number, since it is larger than the sum of its proper divisors (2993755).

31668197 is a wasteful number, since it uses less digits than its factorization.

31668197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9579.

The product of its digits is 54432, while the sum is 41.

The square root of 31668197 is about 5627.4503107535. The cubic root of 31668197 is about 316.3790949155.

The spelling of 31668197 in words is "thirty-one million, six hundred sixty-eight thousand, one hundred ninety-seven".