891038063 has 4 divisors (see below), whose sum is σ = 891105360. Its totient is φ = 890970768.

The previous prime is 891038047. The next prime is 891038069. The reversal of 891038063 is 360830198.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 891038063 - 2⁴ = 891038047 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 (891038069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6470 + ... + 42707.

It is an arithmetic number, because the mean of its divisors is an integer number (222776340).

Almost surely, 2^891038063 is an apocalyptic number.

891038063 is a deficient number, since it is larger than the sum of its proper divisors (67297).

891038063 is a wasteful number, since it uses less digits than its factorization.

891038063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67296.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 891038063 is about 29850.2606856289. The cubic root of 891038063 is about 962.2740012031.

The spelling of 891038063 in words is "eight hundred ninety-one million, thirty-eight thousand, sixty-three".