122813 has 4 divisors (see below), whose sum is σ = 123648. Its totient is φ = 121980.

The previous prime is 122789. The next prime is 122819. The reversal of 122813 is 318221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 318221 = 223 ⋅1427.

It is a cyclic number.

It is not a de Polignac number, because 122813 - 2⁸ = 122557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122791 and 122800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122819) 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, 131 + ... + 512.

It is an arithmetic number, because the mean of its divisors is an integer number (30912).

2¹²²⁸¹³ is an apocalyptic number.

It is an amenable number.

122813 is a deficient number, since it is larger than the sum of its proper divisors (835).

122813 is an equidigital number, since it uses as much as digits as its factorization.

122813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its digits is 96, while the sum is 17.

The square root of 122813 is about 350.4468575976. The cubic root of 122813 is about 49.7066826635.

The spelling of 122813 in words is "one hundred twenty-two thousand, eight hundred thirteen".