123473521 has 2 divisors, whose sum is σ = 123473522. Its totient is φ = 123473520.

The previous prime is 123473491. The next prime is 123473549. The reversal of 123473521 is 125374321.

It is an a-pointer prime, because the next prime (123473549) can be obtained adding 123473521 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 2143296 = 11015^2 + 1464^2 .

It is a cyclic number.

It is not a de Polignac number, because 123473521 - 2⁷ = 123473393 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123473521.

It is not a weakly prime, because it can be changed into another prime (123473221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61736760 + 61736761.

It is an arithmetic number, because the mean of its divisors is an integer number (61736761).

Almost surely, 2^123473521 is an apocalyptic number.

It is an amenable number.

123473521 is a deficient number, since it is larger than the sum of its proper divisors (1).

123473521 is an equidigital number, since it uses as much as digits as its factorization.

123473521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 123473521 is about 11111.8639750494. The cubic root of 123473521 is about 497.9563530614.

The spelling of 123473521 in words is "one hundred twenty-three million, four hundred seventy-three thousand, five hundred twenty-one".