31104409 has 4 divisors (see below), whose sum is σ = 35547904. Its totient is φ = 26660916.

The previous prime is 31104389. The next prime is 31104413. The reversal of 31104409 is 90440113.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90440113 = 31 ⋅2917423.

It is a cyclic number.

It is not a de Polignac number, because 31104409 - 2²¹ = 29007257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31104409.

It is not an unprimeable number, because it can be changed into a prime (31104419) 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, 2221737 + ... + 2221750.

It is an arithmetic number, because the mean of its divisors is an integer number (8886976).

Almost surely, 2^31104409 is an apocalyptic number.

It is an amenable number.

31104409 is a deficient number, since it is larger than the sum of its proper divisors (4443495).

31104409 is an equidigital number, since it uses as much as digits as its factorization.

31104409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443494.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31104409 is about 5577.1326862466. The cubic root of 31104409 is about 314.4903457497.

It can be divided in two parts, 31104 and 409, that added together give a palindrome (31513).

The spelling of 31104409 in words is "thirty-one million, one hundred four thousand, four hundred nine".