123202313 has 4 divisors (see below), whose sum is σ = 132679428. Its totient is φ = 113725200.

The previous prime is 123202309. The next prime is 123202351. The reversal of 123202313 is 313202321.

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 7166329 + 116035984 = 2677^2 + 10772^2 .

It is a cyclic number.

It is not a de Polignac number, because 123202313 - 2² = 123202309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123202291 and 123202300.

It is not an unprimeable number, because it can be changed into a prime (123202363) 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, 4738538 + ... + 4738563.

It is an arithmetic number, because the mean of its divisors is an integer number (33169857).

Almost surely, 2^123202313 is an apocalyptic number.

123202313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123202313 is a deficient number, since it is larger than the sum of its proper divisors (9477115).

123202313 is an equidigital number, since it uses as much as digits as its factorization.

123202313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9477114.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123202313 is about 11099.6537333378. The cubic root of 123202313 is about 497.5915008926.

Adding to 123202313 its reverse (313202321), we get a palindrome (436404634).

The spelling of 123202313 in words is "one hundred twenty-three million, two hundred two thousand, three hundred thirteen".