31423369 has 2 divisors, whose sum is σ = 31423370. Its totient is φ = 31423368.

The previous prime is 31423351. The next prime is 31423373. The reversal of 31423369 is 96332413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 15327225 = 4012^2 + 3915^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423369 - 2⁷ = 31423241 is a prime.

It is a super-2 number, since 2×31423369² = 1974856238620322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31423369.

It is not a weakly prime, because it can be changed into another prime (31423339) 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, 15711684 + 15711685.

It is an arithmetic number, because the mean of its divisors is an integer number (15711685).

Almost surely, 2^31423369 is an apocalyptic number.

It is an amenable number.

31423369 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423369 is an equidigital number, since it uses as much as digits as its factorization.

31423369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 31.

The square root of 31423369 is about 5605.6550910665. The cubic root of 31423369 is about 315.5616719529.

The spelling of 31423369 in words is "thirty-one million, four hundred twenty-three thousand, three hundred sixty-nine".