867816853 has 2 divisors, whose sum is σ = 867816854. Its totient is φ = 867816852.

The previous prime is 867816809. The next prime is 867816871. The reversal of 867816853 is 358618768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614147524 + 253669329 = 24782^2 + 15927^2 .

It is a cyclic number.

It is not a de Polignac number, because 867816853 - 2¹³ = 867808661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 867816853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867819853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433908426 + 433908427.

It is an arithmetic number, because the mean of its divisors is an integer number (433908427).

Almost surely, 2^867816853 is an apocalyptic number.

It is an amenable number.

867816853 is a deficient number, since it is larger than the sum of its proper divisors (1).

867816853 is an equidigital number, since it uses as much as digits as its factorization.

867816853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 52.

The square root of 867816853 is about 29458.7313542182. The cubic root of 867816853 is about 953.8410886563.

The spelling of 867816853 in words is "eight hundred sixty-seven million, eight hundred sixteen thousand, eight hundred fifty-three".