31123090009 has 16 divisors (see below), whose sum is σ = 34098877440. Its totient is φ = 28171962000.

The previous prime is 31123090007. The next prime is 31123090109. The reversal of 31123090009 is 90009032113.

It is a cyclic number.

It is not a de Polignac number, because 31123090009 - 2¹ = 31123090007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123090003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2624724 + ... + 2636554.

It is an arithmetic number, because the mean of its divisors is an integer number (2131179840).

Almost surely, 2^31123090009 is an apocalyptic number.

It is an amenable number.

31123090009 is a deficient number, since it is larger than the sum of its proper divisors (2975787431).

31123090009 is a wasteful number, since it uses less digits than its factorization.

31123090009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12852.

The product of its (nonzero) digits is 1458, while the sum is 28.

The spelling of 31123090009 in words is "thirty-one billion, one hundred twenty-three million, ninety thousand, nine".