830112781 has 8 divisors (see below), whose sum is σ = 842996000. Its totient is φ = 817244208.

The previous prime is 830112739. The next prime is 830112799. The reversal of 830112781 is 187211038.

It is a happy number.

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 830112781 - 2⁷ = 830112653 is a prime.

It is a super-2 number, since 2×830112781² = 1378174458359107922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (830152781) 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, 181930 + ... + 186436.

It is an arithmetic number, because the mean of its divisors is an integer number (105374500).

Almost surely, 2^830112781 is an apocalyptic number.

It is an amenable number.

830112781 is a deficient number, since it is larger than the sum of its proper divisors (12883219).

830112781 is a wasteful number, since it uses less digits than its factorization.

830112781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7323.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 830112781 is about 28811.6778581186. The cubic root of 830112781 is about 939.8222015463.

The spelling of 830112781 in words is "eight hundred thirty million, one hundred twelve thousand, seven hundred eighty-one".