781113 has 8 divisors (see below), whose sum is σ = 1054368. Its totient is φ = 514304.

The previous prime is 781111. The next prime is 781117. The reversal of 781113 is 311187.

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 781113 - 2¹ = 781111 is a prime.

It is a super-2 number, since 2×781113² = 1220275037538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 781113.

It is not an unprimeable number, because it can be changed into a prime (781111) 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, 1320 + ... + 1817.

It is an arithmetic number, because the mean of its divisors is an integer number (131796).

2⁷⁸¹¹¹³ is an apocalyptic number.

It is an amenable number.

781113 is a deficient number, since it is larger than the sum of its proper divisors (273255).

781113 is a wasteful number, since it uses less digits than its factorization.

781113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223.

The product of its digits is 168, while the sum is 21.

The square root of 781113 is about 883.8059741821. The cubic root of 781113 is about 92.0954035533.

The spelling of 781113 in words is "seven hundred eighty-one thousand, one hundred thirteen".