312400313 has 4 divisors (see below), whose sum is σ = 330776820. Its totient is φ = 294023808.

The previous prime is 312400247. The next prime is 312400321. The reversal of 312400313 is 313004213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 287370304 + 25030009 = 16952^2 + 5003^2 .

It is a cyclic number.

It is not a de Polignac number, because 312400313 - 2¹⁰ = 312399289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 18376489 = 312400313 / (3 + 1 + 2 + 4 + 0 + 0 + 3 + 1 + 3).

It is a junction number, because it is equal to n+sod(n) for n = 312400291 and 312400300.

It is not an unprimeable number, because it can be changed into a prime (312400343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9188228 + ... + 9188261.

It is an arithmetic number, because the mean of its divisors is an integer number (82694205).

Almost surely, 2^312400313 is an apocalyptic number.

It is an amenable number.

312400313 is a deficient number, since it is larger than the sum of its proper divisors (18376507).

312400313 is a wasteful number, since it uses less digits than its factorization.

312400313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18376506.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 312400313 is about 17674.8497306201. The cubic root of 312400313 is about 678.5322385682.

Adding to 312400313 its reverse (313004213), we get a palindrome (625404526).

The spelling of 312400313 in words is "three hundred twelve million, four hundred thousand, three hundred thirteen".