312140743 has 2 divisors, whose sum is σ = 312140744. Its totient is φ = 312140742.

The previous prime is 312140713. The next prime is 312140789. The reversal of 312140743 is 347041213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312140743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312140713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156070371 + 156070372.

It is an arithmetic number, because the mean of its divisors is an integer number (156070372).

Almost surely, 2^312140743 is an apocalyptic number.

312140743 is a deficient number, since it is larger than the sum of its proper divisors (1).

312140743 is an equidigital number, since it uses as much as digits as its factorization.

312140743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 312140743 is about 17667.5052851273. The cubic root of 312140743 is about 678.3442581588.

Adding to 312140743 its reverse (347041213), we get a palindrome (659181956).

The spelling of 312140743 in words is "three hundred twelve million, one hundred forty thousand, seven hundred forty-three".