31045039 has 2 divisors, whose sum is σ = 31045040. Its totient is φ = 31045038.

The previous prime is 31045013. The next prime is 31045067. The reversal of 31045039 is 93054013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31045039 - 2⁹ = 31044527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31045099) 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, 15522519 + 15522520.

It is an arithmetic number, because the mean of its divisors is an integer number (15522520).

Almost surely, 2^31045039 is an apocalyptic number.

31045039 is a deficient number, since it is larger than the sum of its proper divisors (1).

31045039 is an equidigital number, since it uses as much as digits as its factorization.

31045039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 31045039 is about 5571.8075164169. The cubic root of 31045039 is about 314.2901256465.

The spelling of 31045039 in words is "thirty-one million, forty-five thousand, thirty-nine".