868868851 has 2 divisors, whose sum is σ = 868868852. Its totient is φ = 868868850.

The previous prime is 868868831. The next prime is 868868873. The reversal of 868868851 is 158868868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 868868851 - 2⁹ = 868868339 is a prime.

It is not a weakly prime, because it can be changed into another prime (868868801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434434425 + 434434426.

It is an arithmetic number, because the mean of its divisors is an integer number (434434426).

Almost surely, 2^868868851 is an apocalyptic number.

868868851 is a deficient number, since it is larger than the sum of its proper divisors (1).

868868851 is an equidigital number, since it uses as much as digits as its factorization.

868868851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5898240, while the sum is 58.

The square root of 868868851 is about 29476.5813994771. The cubic root of 868868851 is about 954.2263595496.

The spelling of 868868851 in words is "eight hundred sixty-eight million, eight hundred sixty-eight thousand, eight hundred fifty-one".