123921983 has 2 divisors, whose sum is σ = 123921984. Its totient is φ = 123921982.

The previous prime is 123921979. The next prime is 123921997. The reversal of 123921983 is 389129321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123921983 - 2² = 123921979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123921913) 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, 61960991 + 61960992.

It is an arithmetic number, because the mean of its divisors is an integer number (61960992).

Almost surely, 2^123921983 is an apocalyptic number.

123921983 is a deficient number, since it is larger than the sum of its proper divisors (1).

123921983 is an equidigital number, since it uses as much as digits as its factorization.

123921983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 123921983 is about 11132.0251077690. The cubic root of 123921983 is about 498.5584921038.

The spelling of 123921983 in words is "one hundred twenty-three million, nine hundred twenty-one thousand, nine hundred eighty-three".