31109149009 has 4 divisors (see below), whose sum is σ = 31146766704. Its totient is φ = 31071531316.

The previous prime is 31109149003. The next prime is 31109149061. The reversal of 31109149009 is 90094190113.

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 31109149009 - 2⁵ = 31109148977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31109149003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18807607 + ... + 18809260.

It is an arithmetic number, because the mean of its divisors is an integer number (7786691676).

Almost surely, 2^31109149009 is an apocalyptic number.

It is an amenable number.

31109149009 is a deficient number, since it is larger than the sum of its proper divisors (37617695).

31109149009 is an equidigital number, since it uses as much as digits as its factorization.

31109149009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37617694.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 31109149009 in words is "thirty-one billion, one hundred nine million, one hundred forty-nine thousand, nine".