868739 has 2 divisors, whose sum is σ = 868740. Its totient is φ = 868738.

The previous prime is 868727. The next prime is 868741. The reversal of 868739 is 937868.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868739 is a prime.

It is a Sophie Germain prime.

Together with 868741, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 868696 and 868705.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868739.

It is not a weakly prime, because it can be changed into another prime (868799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434369 + 434370.

It is an arithmetic number, because the mean of its divisors is an integer number (434370).

2⁸⁶⁸⁷³⁹ is an apocalyptic number.

868739 is a deficient number, since it is larger than the sum of its proper divisors (1).

868739 is an equidigital number, since it uses as much as digits as its factorization.

868739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 868739 is about 932.0616932371. The cubic root of 868739 is about 95.4178821336.

The spelling of 868739 in words is "eight hundred sixty-eight thousand, seven hundred thirty-nine".