123819973 has 2 divisors, whose sum is σ = 123819974. Its totient is φ = 123819972.

The previous prime is 123819931. The next prime is 123819977. The reversal of 123819973 is 379918321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89737729 + 34082244 = 9473^2 + 5838^2 .

It is a cyclic number.

It is not a de Polignac number, because 123819973 - 2¹³ = 123811781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123819977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61909986 + 61909987.

It is an arithmetic number, because the mean of its divisors is an integer number (61909987).

Almost surely, 2^123819973 is an apocalyptic number.

It is an amenable number.

123819973 is a deficient number, since it is larger than the sum of its proper divisors (1).

123819973 is an equidigital number, since it uses as much as digits as its factorization.

123819973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 123819973 is about 11127.4423386509. The cubic root of 123819973 is about 498.4216535542.

The spelling of 123819973 in words is "one hundred twenty-three million, eight hundred nineteen thousand, nine hundred seventy-three".