312140839 has 8 divisors (see below), whose sum is σ = 317181312. Its totient is φ = 307131000.

The previous prime is 312140819. The next prime is 312140861. The reversal of 312140839 is 938041213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312140839 - 2⁹ = 312140327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312140839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312140819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13342 + ... + 28324.

It is an arithmetic number, because the mean of its divisors is an integer number (39647664).

Almost surely, 2^312140839 is an apocalyptic number.

312140839 is a deficient number, since it is larger than the sum of its proper divisors (5040473).

312140839 is a wasteful number, since it uses less digits than its factorization.

312140839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15317.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 312140839 is about 17667.5080019792. The cubic root of 312140839 is about 678.3443277012.

The spelling of 312140839 in words is "three hundred twelve million, one hundred forty thousand, eight hundred thirty-nine".