31061369 has 2 divisors, whose sum is σ = 31061370. Its totient is φ = 31061368.

The previous prime is 31061353. The next prime is 31061399. The reversal of 31061369 is 96316013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 976144 = 5485^2 + 988^2 .

It is a cyclic number.

It is not a de Polignac number, because 31061369 - 2⁴ = 31061353 is a prime.

It is a super-2 number, since 2×31061369² = 1929617288308322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31061309) 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, 15530684 + 15530685.

It is an arithmetic number, because the mean of its divisors is an integer number (15530685).

Almost surely, 2^31061369 is an apocalyptic number.

It is an amenable number.

31061369 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061369 is an equidigital number, since it uses as much as digits as its factorization.

31061369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 31061369 is about 5573.2727369114. The cubic root of 31061369 is about 314.3452225668.

The spelling of 31061369 in words is "thirty-one million, sixty-one thousand, three hundred sixty-nine".