31980269 has 2 divisors, whose sum is σ = 31980270. Its totient is φ = 31980268.

The previous prime is 31980259. The next prime is 31980271. The reversal of 31980269 is 96208913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31866025 + 114244 = 5645^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 31980269 - 2¹² = 31976173 is a prime.

It is a super-2 number, since 2×31980269² = 2045475210624722, which contains 22 as substring.

Together with 31980271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31980209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15990134 + 15990135.

It is an arithmetic number, because the mean of its divisors is an integer number (15990135).

Almost surely, 2^31980269 is an apocalyptic number.

It is an amenable number.

31980269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31980269 is an equidigital number, since it uses as much as digits as its factorization.

31980269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 31980269 is about 5655.1099900886. The cubic root of 31980269 is about 317.4149448732.

The spelling of 31980269 in words is "thirty-one million, nine hundred eighty thousand, two hundred sixty-nine".