123311399 has 2 divisors, whose sum is σ = 123311400. Its totient is φ = 123311398.

The previous prime is 123311389. The next prime is 123311413. The reversal of 123311399 is 993113321.

It is a weak prime.

It is an emirp because it is prime and its reverse (993113321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123311399 is a prime.

It is a super-2 number, since 2×123311399² = 30411402246674402, which contains 22 as substring.

It is equal to p_7019438 and since 123311399 and 7019438 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123311359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655699 + 61655700.

It is an arithmetic number, because the mean of its divisors is an integer number (61655700).

Almost surely, 2^123311399 is an apocalyptic number.

123311399 is a deficient number, since it is larger than the sum of its proper divisors (1).

123311399 is an equidigital number, since it uses as much as digits as its factorization.

123311399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 32.

The square root of 123311399 is about 11104.5665831675. The cubic root of 123311399 is about 497.7383170054.

The spelling of 123311399 in words is "one hundred twenty-three million, three hundred eleven thousand, three hundred ninety-nine".