123402313 has 2 divisors, whose sum is σ = 123402314. Its totient is φ = 123402312.

The previous prime is 123402311. The next prime is 123402341. The reversal of 123402313 is 313204321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123365449 + 36864 = 11107^2 + 192^2 .

It is a cyclic number.

It is not a de Polignac number, because 123402313 - 2¹ = 123402311 is a prime.

Together with 123402311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123402311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61701156 + 61701157.

It is an arithmetic number, because the mean of its divisors is an integer number (61701157).

Almost surely, 2^123402313 is an apocalyptic number.

It is an amenable number.

123402313 is a deficient number, since it is larger than the sum of its proper divisors (1).

123402313 is an equidigital number, since it uses as much as digits as its factorization.

123402313 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 123402313 is about 11108.6593700590. The cubic root of 123402313 is about 497.8606097413.

Adding to 123402313 its reverse (313204321), we get a palindrome (436606634).

The spelling of 123402313 in words is "one hundred twenty-three million, four hundred two thousand, three hundred thirteen".