891863135 has 12 divisors (see below), whose sum is σ = 1129530888. Its totient is φ = 675937008.

The previous prime is 891863131. The next prime is 891863177. The reversal of 891863135 is 531368198.

It is not a de Polignac number, because 891863135 - 2² = 891863131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891863131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245249 + ... + 248858.

It is an arithmetic number, because the mean of its divisors is an integer number (94127574).

Almost surely, 2^891863135 is an apocalyptic number.

891863135 is a deficient number, since it is larger than the sum of its proper divisors (237667753).

891863135 is a wasteful number, since it uses less digits than its factorization.

891863135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494150 (or 494131 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 891863135 is about 29864.0776686641. The cubic root of 891863135 is about 962.5709209562.

The spelling of 891863135 in words is "eight hundred ninety-one million, eight hundred sixty-three thousand, one hundred thirty-five".