312440563 has 2 divisors, whose sum is σ = 312440564. Its totient is φ = 312440562.

The previous prime is 312440561. The next prime is 312440591. The reversal of 312440563 is 365044213.

It is an a-pointer prime, because the next prime (312440591) can be obtained adding 312440563 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312440563 - 2¹ = 312440561 is a prime.

Together with 312440561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312440561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156220281 + 156220282.

It is an arithmetic number, because the mean of its divisors is an integer number (156220282).

Almost surely, 2^312440563 is an apocalyptic number.

312440563 is a deficient number, since it is larger than the sum of its proper divisors (1).

312440563 is an equidigital number, since it uses as much as digits as its factorization.

312440563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 312440563 is about 17675.9883174888. The cubic root of 312440563 is about 678.5613782635.

Adding to 312440563 its reverse (365044213), we get a palindrome (677484776).

The spelling of 312440563 in words is "three hundred twelve million, four hundred forty thousand, five hundred sixty-three".