851890159 has 2 divisors, whose sum is σ = 851890160. Its totient is φ = 851890158.

The previous prime is 851890153. The next prime is 851890201. The reversal of 851890159 is 951098158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851890159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851890153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425945079 + 425945080.

It is an arithmetic number, because the mean of its divisors is an integer number (425945080).

Almost surely, 2^851890159 is an apocalyptic number.

851890159 is a deficient number, since it is larger than the sum of its proper divisors (1).

851890159 is an equidigital number, since it uses as much as digits as its factorization.

851890159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 851890159 is about 29187.1574326792. The cubic root of 851890159 is about 947.9698693593.

The spelling of 851890159 in words is "eight hundred fifty-one million, eight hundred ninety thousand, one hundred fifty-nine".