7312109 has 4 divisors (see below), whose sum is σ = 8356704. Its totient is φ = 6267516.

The previous prime is 7312103. The next prime is 7312127. The reversal of 7312109 is 9012137.

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 7312109 - 2¹² = 7308013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7312103) 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, 522287 + ... + 522300.

It is an arithmetic number, because the mean of its divisors is an integer number (2089176).

Almost surely, 2^7312109 is an apocalyptic number.

It is an amenable number.

7312109 is a deficient number, since it is larger than the sum of its proper divisors (1044595).

7312109 is a wasteful number, since it uses less digits than its factorization.

7312109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044594.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 7312109 is about 2704.0911597060. The cubic root of 7312109 is about 194.0949423687.

The spelling of 7312109 in words is "seven million, three hundred twelve thousand, one hundred nine".