868901849 has 2 divisors, whose sum is σ = 868901850. Its totient is φ = 868901848.

The previous prime is 868901833. The next prime is 868901881. The reversal of 868901849 is 948109868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809118025 + 59783824 = 28445^2 + 7732^2 .

It is a cyclic number.

It is not a de Polignac number, because 868901849 - 2⁴ = 868901833 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 868901849.

It is not a weakly prime, because it can be changed into another prime (868901809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434450924 + 434450925.

It is an arithmetic number, because the mean of its divisors is an integer number (434450925).

Almost surely, 2^868901849 is an apocalyptic number.

It is an amenable number.

868901849 is a deficient number, since it is larger than the sum of its proper divisors (1).

868901849 is an equidigital number, since it uses as much as digits as its factorization.

868901849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 868901849 is about 29477.1411266425. The cubic root of 868901849 is about 954.2384393024.

The spelling of 868901849 in words is "eight hundred sixty-eight million, nine hundred one thousand, eight hundred forty-nine".