868631783 has 2 divisors, whose sum is σ = 868631784. Its totient is φ = 868631782.

The previous prime is 868631773. The next prime is 868631831. The reversal of 868631783 is 387136868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 868631783 - 2⁴ = 868631767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868631773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434315891 + 434315892.

It is an arithmetic number, because the mean of its divisors is an integer number (434315892).

Almost surely, 2^868631783 is an apocalyptic number.

868631783 is a deficient number, since it is larger than the sum of its proper divisors (1).

868631783 is an equidigital number, since it uses as much as digits as its factorization.

868631783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 868631783 is about 29472.5598311378. The cubic root of 868631783 is about 954.1395658171.

The spelling of 868631783 in words is "eight hundred sixty-eight million, six hundred thirty-one thousand, seven hundred eighty-three".