31146009 has 4 divisors (see below), whose sum is σ = 41528016. Its totient is φ = 20764004.

The previous prime is 31145977. The next prime is 31146013. The reversal of 31146009 is 90064113.

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 31146009 - 2⁵ = 31145977 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31146009.

It is not an unprimeable number, because it can be changed into a prime (31146079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5190999 + ... + 5191004.

It is an arithmetic number, because the mean of its divisors is an integer number (10382004).

Almost surely, 2^31146009 is an apocalyptic number.

It is an amenable number.

31146009 is a deficient number, since it is larger than the sum of its proper divisors (10382007).

31146009 is a wasteful number, since it uses less digits than its factorization.

31146009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10382006.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 31146009 is about 5580.8609550857. The cubic root of 31146009 is about 314.6304863352.

The spelling of 31146009 in words is "thirty-one million, one hundred forty-six thousand, nine".