123400973 has 2 divisors, whose sum is σ = 123400974. Its totient is φ = 123400972.

The previous prime is 123400889. The next prime is 123400999. The reversal of 123400973 is 379004321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106770889 + 16630084 = 10333^2 + 4078^2 .

It is an emirp because it is prime and its reverse (379004321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123400973 - 2¹² = 123396877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123400073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61700486 + 61700487.

It is an arithmetic number, because the mean of its divisors is an integer number (61700487).

Almost surely, 2^123400973 is an apocalyptic number.

It is an amenable number.

123400973 is a deficient number, since it is larger than the sum of its proper divisors (1).

123400973 is an equidigital number, since it uses as much as digits as its factorization.

123400973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 123400973 is about 11108.5990565867. The cubic root of 123400973 is about 497.8588076799.

The spelling of 123400973 in words is "one hundred twenty-three million, four hundred thousand, nine hundred seventy-three".