891185345 has 8 divisors (see below), whose sum is σ = 1079417664. Its totient is φ = 706284784.

The previous prime is 891185311. The next prime is 891185353. The reversal of 891185345 is 543581198.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 891185345 - 2²⁰ = 890136769 is a prime.

It is a super-2 number, since 2×891185345² = 1588422638285538050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 891185296 and 891185305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832349 + ... + 833418.

It is an arithmetic number, because the mean of its divisors is an integer number (134927208).

Almost surely, 2^891185345 is an apocalyptic number.

It is an amenable number.

891185345 is a deficient number, since it is larger than the sum of its proper divisors (188232319).

891185345 is a wasteful number, since it uses less digits than its factorization.

891185345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665879.

The product of its digits is 172800, while the sum is 44.

The square root of 891185345 is about 29852.7275973235. The cubic root of 891185345 is about 962.3270172067.

The spelling of 891185345 in words is "eight hundred ninety-one million, one hundred eighty-five thousand, three hundred forty-five".