31029269 has 2 divisors, whose sum is σ = 31029270. Its totient is φ = 31029268.

The previous prime is 31029253. The next prime is 31029289. The reversal of 31029269 is 96292013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25908100 + 5121169 = 5090^2 + 2263^2 .

It is an emirp because it is prime and its reverse (96292013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31029269 - 2⁴ = 31029253 is a prime.

It is a super-2 number, since 2×31029269² = 1925631069348722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31029209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15514634 + 15514635.

It is an arithmetic number, because the mean of its divisors is an integer number (15514635).

Almost surely, 2^31029269 is an apocalyptic number.

It is an amenable number.

31029269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31029269 is an equidigital number, since it uses as much as digits as its factorization.

31029269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 31029269 is about 5570.3921764989. The cubic root of 31029269 is about 314.2368998074.

The spelling of 31029269 in words is "thirty-one million, twenty-nine thousand, two hundred sixty-nine".