31029109 has 16 divisors (see below), whose sum is σ = 34048000. Its totient is φ = 28168560.

The previous prime is 31029091. The next prime is 31029121. The reversal of 31029109 is 90192013.

It is a cyclic number.

It is not a de Polignac number, because 31029109 - 2⁵ = 31029077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31029179) 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 15 ways as a sum of consecutive naturals, for example, 81682 + ... + 82060.

It is an arithmetic number, because the mean of its divisors is an integer number (2128000).

Almost surely, 2^31029109 is an apocalyptic number.

It is an amenable number.

31029109 is a deficient number, since it is larger than the sum of its proper divisors (3018891).

31029109 is a wasteful number, since it uses less digits than its factorization.

31029109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 31029109 is about 5570.3778148345. The cubic root of 31029109 is about 314.2363596938.

The spelling of 31029109 in words is "thirty-one million, twenty-nine thousand, one hundred nine".