868511503 has 2 divisors, whose sum is σ = 868511504. Its totient is φ = 868511502.

The previous prime is 868511491. The next prime is 868511507. The reversal of 868511503 is 305115868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868511503 - 2⁹ = 868510991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868511507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434255751 + 434255752.

It is an arithmetic number, because the mean of its divisors is an integer number (434255752).

Almost surely, 2^868511503 is an apocalyptic number.

868511503 is a deficient number, since it is larger than the sum of its proper divisors (1).

868511503 is an equidigital number, since it uses as much as digits as its factorization.

868511503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 868511503 is about 29470.5192183646. The cubic root of 868511503 is about 954.0955236783.

The spelling of 868511503 in words is "eight hundred sixty-eight million, five hundred eleven thousand, five hundred three".