31124029 has 2 divisors, whose sum is σ = 31124030. Its totient is φ = 31124028.

The previous prime is 31124021. The next prime is 31124039. The reversal of 31124029 is 92042113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27321529 + 3802500 = 5227^2 + 1950^2 .

It is a cyclic number.

It is not a de Polignac number, because 31124029 - 2³ = 31124021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31124021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562014 + 15562015.

It is an arithmetic number, because the mean of its divisors is an integer number (15562015).

Almost surely, 2^31124029 is an apocalyptic number.

It is an amenable number.

31124029 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124029 is an equidigital number, since it uses as much as digits as its factorization.

31124029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31124029 is about 5578.8913773258. The cubic root of 31124029 is about 314.5564564595.

The spelling of 31124029 in words is "thirty-one million, one hundred twenty-four thousand, twenty-nine".