891093917 has 12 divisors (see below), whose sum is σ = 1035391968. Its totient is φ = 751251600.

The previous prime is 891093881. The next prime is 891093919. The reversal of 891093917 is 719390198.

It is a happy number.

891093917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 891093917 - 2⁸ = 891093661 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 (891093919) 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, 8942 + ... + 43152.

It is an arithmetic number, because the mean of its divisors is an integer number (86282664).

Almost surely, 2^891093917 is an apocalyptic number.

It is an amenable number.

891093917 is a deficient number, since it is larger than the sum of its proper divisors (144298051).

891093917 is an equidigital number, since it uses as much as digits as its factorization.

891093917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34340 (or 34279 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 891093917 is about 29851.1962406869. The cubic root of 891093917 is about 962.2941072387.

The spelling of 891093917 in words is "eight hundred ninety-one million, ninety-three thousand, nine hundred seventeen".