31374169 has 2 divisors, whose sum is σ = 31374170. Its totient is φ = 31374168.

The previous prime is 31374151. The next prime is 31374179. The reversal of 31374169 is 96147313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29300569 + 2073600 = 5413^2 + 1440^2 .

It is an emirp because it is prime and its reverse (96147313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31374169 - 2⁵ = 31374137 is a prime.

It is a super-2 number, since 2×31374169² = 1968676960881122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31374179) 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 as a sum of consecutive naturals, namely, 15687084 + 15687085.

It is an arithmetic number, because the mean of its divisors is an integer number (15687085).

Almost surely, 2^31374169 is an apocalyptic number.

It is an amenable number.

31374169 is a deficient number, since it is larger than the sum of its proper divisors (1).

31374169 is an equidigital number, since it uses as much as digits as its factorization.

31374169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 31374169 is about 5601.2649464206. The cubic root of 31374169 is about 315.3968928441.

The spelling of 31374169 in words is "thirty-one million, three hundred seventy-four thousand, one hundred sixty-nine".