312320109 has 8 divisors (see below), whose sum is σ = 416820640. Its totient is φ = 208016496.

The previous prime is 312320093. The next prime is 312320131. The reversal of 312320109 is 901023213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312320109 - 2⁴ = 312320093 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 (312320159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45487 + ... + 51900.

It is an arithmetic number, because the mean of its divisors is an integer number (52102580).

Almost surely, 2^312320109 is an apocalyptic number.

It is an amenable number.

312320109 is a deficient number, since it is larger than the sum of its proper divisors (104500531).

312320109 is a wasteful number, since it uses less digits than its factorization.

312320109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98459.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 312320109 is about 17672.5807113732. The cubic root of 312320109 is about 678.4741660084.

It can be divided in two parts, 3123 and 20109, that added together give a palindrome (23232).

The spelling of 312320109 in words is "three hundred twelve million, three hundred twenty thousand, one hundred nine".