913881 has 8 divisors (see below), whose sum is σ = 1282720. Its totient is φ = 577152.

The previous prime is 913873. The next prime is 913889. The reversal of 913881 is 188319.

It is an interprime number because it is at equal distance from previous prime (913873) and next prime (913889).

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

It is not a de Polignac number, because 913881 - 2³ = 913873 is a prime.

It is a super-2 number, since 2×913881² = 1670356964322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 913881.

It is not an unprimeable number, because it can be changed into a prime (913889) 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, 7960 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (160340).

2⁹¹³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

913881 is a deficient number, since it is larger than the sum of its proper divisors (368839).

913881 is a wasteful number, since it uses less digits than its factorization.

913881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16055.

The product of its digits is 1728, while the sum is 30.

The square root of 913881 is about 955.9712338768. The cubic root of 913881 is about 97.0427770372.

The spelling of 913881 in words is "nine hundred thirteen thousand, eight hundred eighty-one".