312123349 has 4 divisors (see below), whose sum is σ = 330483564. Its totient is φ = 293763136.

The previous prime is 312123337. The next prime is 312123359. The reversal of 312123349 is 943321213.

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 225540324 + 86583025 = 15018^2 + 9305^2 .

It is a cyclic number.

It is not a de Polignac number, because 312123349 - 2¹¹ = 312121301 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 (312123359) 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, 9180082 + ... + 9180115.

It is an arithmetic number, because the mean of its divisors is an integer number (82620891).

Almost surely, 2^312123349 is an apocalyptic number.

It is an amenable number.

312123349 is a deficient number, since it is larger than the sum of its proper divisors (18360215).

312123349 is a wasteful number, since it uses less digits than its factorization.

312123349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18360214.

The product of its digits is 3888, while the sum is 28.

The square root of 312123349 is about 17667.0130186175. The cubic root of 312123349 is about 678.3316577112.

The spelling of 312123349 in words is "three hundred twelve million, one hundred twenty-three thousand, three hundred forty-nine".