891161503 has 16 divisors (see below), whose sum is σ = 972252000. Its totient is φ = 813601152.

The previous prime is 891161489. The next prime is 891161521. The reversal of 891161503 is 305161198.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-891161503 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 (891161303) 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 in 15 ways as a sum of consecutive naturals, for example, 371833 + ... + 374221.

It is an arithmetic number, because the mean of its divisors is an integer number (60765750).

Almost surely, 2^891161503 is an apocalyptic number.

891161503 is a deficient number, since it is larger than the sum of its proper divisors (81090497).

891161503 is a wasteful number, since it uses less digits than its factorization.

891161503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 891161503 is about 29852.3282676578. The cubic root of 891161503 is about 962.3184353759.

The spelling of 891161503 in words is "eight hundred ninety-one million, one hundred sixty-one thousand, five hundred three".