123239983 has 2 divisors, whose sum is σ = 123239984. Its totient is φ = 123239982.

The previous prime is 123239971. The next prime is 123239993. The reversal of 123239983 is 389932321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123239983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123239903) 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, 61619991 + 61619992.

It is an arithmetic number, because the mean of its divisors is an integer number (61619992).

Almost surely, 2^123239983 is an apocalyptic number.

123239983 is a deficient number, since it is larger than the sum of its proper divisors (1).

123239983 is an equidigital number, since it uses as much as digits as its factorization.

123239983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 123239983 is about 11101.3505034298. The cubic root of 123239983 is about 497.6422097938.

The spelling of 123239983 in words is "one hundred twenty-three million, two hundred thirty-nine thousand, nine hundred eighty-three".