312000503 has 2 divisors, whose sum is σ = 312000504. Its totient is φ = 312000502.

The previous prime is 312000499. The next prime is 312000509. The reversal of 312000503 is 305000213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312000503 - 2² = 312000499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312000509) 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, 156000251 + 156000252.

It is an arithmetic number, because the mean of its divisors is an integer number (156000252).

Almost surely, 2^312000503 is an apocalyptic number.

312000503 is a deficient number, since it is larger than the sum of its proper divisors (1).

312000503 is an equidigital number, since it uses as much as digits as its factorization.

312000503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 312000503 is about 17663.5359710337. The cubic root of 312000503 is about 678.2426530854.

Adding to 312000503 its reverse (305000213), we get a palindrome (617000716).

The spelling of 312000503 in words is "three hundred twelve million, five hundred three", and thus it is an aban number.