123021473 has 2 divisors, whose sum is σ = 123021474. Its totient is φ = 123021472.

The previous prime is 123021413. The next prime is 123021491. The reversal of 123021473 is 374120321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99760144 + 23261329 = 9988^2 + 4823^2 .

It is an emirp because it is prime and its reverse (374120321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123021473 - 2¹⁴ = 123005089 is a prime.

It is not a weakly prime, because it can be changed into another prime (123021413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510736 + 61510737.

It is an arithmetic number, because the mean of its divisors is an integer number (61510737).

Almost surely, 2^123021473 is an apocalyptic number.

It is an amenable number.

123021473 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021473 is an equidigital number, since it uses as much as digits as its factorization.

123021473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 123021473 is about 11091.5045417653. The cubic root of 123021473 is about 497.3479218341.

Adding to 123021473 its reverse (374120321), we get a palindrome (497141794).

The spelling of 123021473 in words is "one hundred twenty-three million, twenty-one thousand, four hundred seventy-three".