31030109 has 4 divisors (see below), whose sum is σ = 33851040. Its totient is φ = 28209180.

The previous prime is 31030093. The next prime is 31030123. The reversal of 31030109 is 90103013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31030109 - 2⁴ = 31030093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31030159) 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 in 3 ways as a sum of consecutive naturals, for example, 1410449 + ... + 1410470.

It is an arithmetic number, because the mean of its divisors is an integer number (8462760).

Almost surely, 2^31030109 is an apocalyptic number.

It is an amenable number.

31030109 is a deficient number, since it is larger than the sum of its proper divisors (2820931).

31030109 is a wasteful number, since it uses less digits than its factorization.

31030109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820930.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 31030109 is about 5570.4675746296. The cubic root of 31030109 is about 314.2397353733.

The spelling of 31030109 in words is "thirty-one million, thirty thousand, one hundred nine".