31943369 has 2 divisors, whose sum is σ = 31943370. Its totient is φ = 31943368.

The previous prime is 31943341. The next prime is 31943381. The reversal of 31943369 is 96334913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 3853369 = 5300^2 + 1963^2 .

It is a cyclic number.

It is not a de Polignac number, because 31943369 - 2²⁴ = 15166153 is a prime.

It is a super-5 number, since 5×31943369⁵ (a number of 39 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31943399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15971684 + 15971685.

It is an arithmetic number, because the mean of its divisors is an integer number (15971685).

Almost surely, 2^31943369 is an apocalyptic number.

It is an amenable number.

31943369 is a deficient number, since it is larger than the sum of its proper divisors (1).

31943369 is an equidigital number, since it uses as much as digits as its factorization.

31943369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 38.

The square root of 31943369 is about 5651.8465124241. The cubic root of 31943369 is about 317.2928162448.

The spelling of 31943369 in words is "thirty-one million, nine hundred forty-three thousand, three hundred sixty-nine".