913891 has 8 divisors (see below), whose sum is σ = 1003968. Its totient is φ = 825000.

The previous prime is 913889. The next prime is 913907. The reversal of 913891 is 198319.

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

It is not a de Polignac number, because 913891 - 2¹ = 913889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (913811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2596 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (125496).

2⁹¹³⁸⁹¹ is an apocalyptic number.

913891 is a deficient number, since it is larger than the sum of its proper divisors (90077).

913891 is a wasteful number, since it uses less digits than its factorization.

913891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its digits is 1944, while the sum is 31.

The square root of 913891 is about 955.9764641454. The cubic root of 913891 is about 97.0431309943.

It can be divided in two parts, 9138 and 91, that added together give a palindrome (9229).

The spelling of 913891 in words is "nine hundred thirteen thousand, eight hundred ninety-one".