123420313 has 2 divisors, whose sum is σ = 123420314. Its totient is φ = 123420312.

The previous prime is 123420299. The next prime is 123420329. The reversal of 123420313 is 313024321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66145689 + 57274624 = 8133^2 + 7568^2 .

It is a cyclic number.

It is not a de Polignac number, because 123420313 - 2⁵ = 123420281 is a prime.

It is a super-2 number, since 2×123420313² = 30465147322035938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123420383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710156 + 61710157.

It is an arithmetic number, because the mean of its divisors is an integer number (61710157).

Almost surely, 2^123420313 is an apocalyptic number.

It is an amenable number.

123420313 is a deficient number, since it is larger than the sum of its proper divisors (1).

123420313 is an equidigital number, since it uses as much as digits as its factorization.

123420313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 123420313 is about 11109.4695192885. The cubic root of 123420313 is about 497.8848152716.

Adding to 123420313 its reverse (313024321), we get a palindrome (436444634).

The spelling of 123420313 in words is "one hundred twenty-three million, four hundred twenty thousand, three hundred thirteen".