891331349 has 8 divisors (see below), whose sum is σ = 928549440. Its totient is φ = 854850400.

The previous prime is 891331319. The next prime is 891331379. The reversal of 891331349 is 943133198.

It is an interprime number because it is at equal distance from previous prime (891331319) and next prime (891331379).

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 891331349 - 2⁸ = 891331093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891331319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181817 + ... + 186654.

It is an arithmetic number, because the mean of its divisors is an integer number (116068680).

Almost surely, 2^891331349 is an apocalyptic number.

It is an amenable number.

891331349 is a deficient number, since it is larger than the sum of its proper divisors (37218091).

891331349 is a wasteful number, since it uses less digits than its factorization.

891331349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368571.

The product of its digits is 69984, while the sum is 41.

The square root of 891331349 is about 29855.1729018607. The cubic root of 891331349 is about 962.3795674131.

The spelling of 891331349 in words is "eight hundred ninety-one million, three hundred thirty-one thousand, three hundred forty-nine".