312331949 has 4 divisors (see below), whose sum is σ = 315551964. Its totient is φ = 309111936.

The previous prime is 312331853. The next prime is 312332003. The reversal of 312331949 is 949133213.

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 101646724 + 210685225 = 10082^2 + 14515^2 .

It is a cyclic number.

It is not a de Polignac number, because 312331949 - 2¹² = 312327853 is a prime.

It is a super-2 number, since 2×312331949² = 195102492732277202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312331049) 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, 1609862 + ... + 1610055.

It is an arithmetic number, because the mean of its divisors is an integer number (78887991).

Almost surely, 2^312331949 is an apocalyptic number.

It is an amenable number.

312331949 is a deficient number, since it is larger than the sum of its proper divisors (3220015).

312331949 is an equidigital number, since it uses as much as digits as its factorization.

312331949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220014.

The product of its digits is 17496, while the sum is 35.

The square root of 312331949 is about 17672.9156904004. The cubic root of 312331949 is about 678.4827395119.

The spelling of 312331949 in words is "three hundred twelve million, three hundred thirty-one thousand, nine hundred forty-nine".