868809727 has 2 divisors, whose sum is σ = 868809728. Its totient is φ = 868809726.

The previous prime is 868809707. The next prime is 868809731. The reversal of 868809727 is 727908868.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868809727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868809707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434404863 + 434404864.

It is an arithmetic number, because the mean of its divisors is an integer number (434404864).

Almost surely, 2^868809727 is an apocalyptic number.

868809727 is a deficient number, since it is larger than the sum of its proper divisors (1).

868809727 is an equidigital number, since it uses as much as digits as its factorization.

868809727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The square root of 868809727 is about 29475.5784845692. The cubic root of 868809727 is about 954.2047149485.

The spelling of 868809727 in words is "eight hundred sixty-eight million, eight hundred nine thousand, seven hundred twenty-seven".