312340043 has 4 divisors (see below), whose sum is σ = 312802080. Its totient is φ = 311878008.

The previous prime is 312340037. The next prime is 312340073. The reversal of 312340043 is 340043213.

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

It is a cyclic number.

It is not a de Polignac number, because 312340043 - 2¹⁴ = 312323659 is a prime.

It is a super-2 number, since 2×312340043² = 195112604922483698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312339997 and 312340024.

It is not an unprimeable number, because it can be changed into a prime (312340013) 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, 230003 + ... + 231356.

It is an arithmetic number, because the mean of its divisors is an integer number (78200520).

Almost surely, 2^312340043 is an apocalyptic number.

312340043 is a deficient number, since it is larger than the sum of its proper divisors (462037).

312340043 is an equidigital number, since it uses as much as digits as its factorization.

312340043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462036.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 312340043 is about 17673.1446833890. The cubic root of 312340043 is about 678.4886003616.

Adding to 312340043 its reverse (340043213), we get a palindrome (652383256).

The spelling of 312340043 in words is "three hundred twelve million, three hundred forty thousand, forty-three".