913831 has 4 divisors (see below), whose sum is σ = 922032. Its totient is φ = 905632.

The previous prime is 913811. The next prime is 913853. The reversal of 913831 is 138319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 913831 - 2⁵ = 913799 is a prime.

It is a super-2 number, since 2×913831² = 1670174193122, which contains 22 as substring.

It is a Duffinian number.

913831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 913796 and 913805.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3931 + ... + 4156.

It is an arithmetic number, because the mean of its divisors is an integer number (230508).

2⁹¹³⁸³¹ is an apocalyptic number.

913831 is a deficient number, since it is larger than the sum of its proper divisors (8201).

913831 is a wasteful number, since it uses less digits than its factorization.

913831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200.

The product of its digits is 648, while the sum is 25.

The square root of 913831 is about 955.9450821046. The cubic root of 913831 is about 97.0410072125.

The spelling of 913831 in words is "nine hundred thirteen thousand, eight hundred thirty-one".