312640743 has 8 divisors (see below), whose sum is σ = 417023856. Its totient is φ = 208342400.

The previous prime is 312640739. The next prime is 312640747. The reversal of 312640743 is 347046213.

It is an interprime number because it is at equal distance from previous prime (312640739) and next prime (312640747).

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 312640743 - 2² = 312640739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312640743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312640747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12018 + ... + 27743.

It is an arithmetic number, because the mean of its divisors is an integer number (52127982).

Almost surely, 2^312640743 is an apocalyptic number.

312640743 is a deficient number, since it is larger than the sum of its proper divisors (104383113).

312640743 is a wasteful number, since it uses less digits than its factorization.

312640743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42385.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 312640743 is about 17681.6498947355. The cubic root of 312640743 is about 678.7062649326.

Adding to 312640743 its reverse (347046213), we get a palindrome (659686956).

The spelling of 312640743 in words is "three hundred twelve million, six hundred forty thousand, seven hundred forty-three".