31424329 has 2 divisors, whose sum is σ = 31424330. Its totient is φ = 31424328.

The previous prime is 31424321. The next prime is 31424353. The reversal of 31424329 is 92342413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 898704 = 5525^2 + 948^2 .

It is a cyclic number.

It is not a de Polignac number, because 31424329 - 2³ = 31424321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31424297 and 31424306.

It is not a weakly prime, because it can be changed into another prime (31424321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712164 + 15712165.

It is an arithmetic number, because the mean of its divisors is an integer number (15712165).

Almost surely, 2^31424329 is an apocalyptic number.

It is an amenable number.

31424329 is a deficient number, since it is larger than the sum of its proper divisors (1).

31424329 is an equidigital number, since it uses as much as digits as its factorization.

31424329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 31424329 is about 5605.7407182281. The cubic root of 31424329 is about 315.5648854437.

The spelling of 31424329 in words is "thirty-one million, four hundred twenty-four thousand, three hundred twenty-nine".