122843813 has 4 divisors (see below), whose sum is σ = 124857708. Its totient is φ = 120829920.

The previous prime is 122843783. The next prime is 122843821. The reversal of 122843813 is 318348221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23203489 + 99640324 = 4817^2 + 9982^2 .

It is a cyclic number.

It is not a de Polignac number, because 122843813 - 2⁸ = 122843557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 122843813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122843213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006856 + ... + 1006977.

It is an arithmetic number, because the mean of its divisors is an integer number (31214427).

Almost surely, 2^122843813 is an apocalyptic number.

It is an amenable number.

122843813 is a deficient number, since it is larger than the sum of its proper divisors (2013895).

122843813 is an equidigital number, since it uses as much as digits as its factorization.

122843813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013894.

The product of its digits is 9216, while the sum is 32.

The square root of 122843813 is about 11083.4928158952. The cubic root of 122843813 is about 497.1083934604.

The spelling of 122843813 in words is "one hundred twenty-two million, eight hundred forty-three thousand, eight hundred thirteen".