313212009 has 24 divisors (see below), whose sum is σ = 463631616. Its totient is φ = 187924000.

The previous prime is 313212001. The next prime is 313212041. The reversal of 313212009 is 900212313.

It is a happy number.

It is not a de Polignac number, because 313212009 - 2³ = 313212001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (313212001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32392 + ... + 40934.

It is an arithmetic number, because the mean of its divisors is an integer number (19317984).

Almost surely, 2^313212009 is an apocalyptic number.

It is an amenable number.

313212009 is a deficient number, since it is larger than the sum of its proper divisors (150419607).

313212009 is a wasteful number, since it uses less digits than its factorization.

313212009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8669 (or 8658 counting only the distinct ones).

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

The square root of 313212009 is about 17697.7967272765. The cubic root of 313212009 is about 679.1193971610.

The spelling of 313212009 in words is "three hundred thirteen million, two hundred twelve thousand, nine".