868763531 has 2 divisors, whose sum is σ = 868763532. Its totient is φ = 868763530.

The previous prime is 868763513. The next prime is 868763569. The reversal of 868763531 is 135367868.

It is a happy number.

868763531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (868763513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868763531 is a prime.

It is a super-2 number, since 2×868763531² = 1509500145591175922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (868763591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434381765 + 434381766.

It is an arithmetic number, because the mean of its divisors is an integer number (434381766).

Almost surely, 2^868763531 is an apocalyptic number.

868763531 is a deficient number, since it is larger than the sum of its proper divisors (1).

868763531 is an equidigital number, since it uses as much as digits as its factorization.

868763531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 868763531 is about 29474.7948423734. The cubic root of 868763531 is about 954.1878024528.

The spelling of 868763531 in words is "eight hundred sixty-eight million, seven hundred sixty-three thousand, five hundred thirty-one".