23121473 has 2 divisors, whose sum is σ = 23121474. Its totient is φ = 23121472.

The previous prime is 23121457. The next prime is 23121481. The reversal of 23121473 is 37412132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20539024 + 2582449 = 4532^2 + 1607^2 .

It is a cyclic number.

It is not a de Polignac number, because 23121473 - 2⁴ = 23121457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23121403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560736 + 11560737.

It is an arithmetic number, because the mean of its divisors is an integer number (11560737).

Almost surely, 2^23121473 is an apocalyptic number.

It is an amenable number.

23121473 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121473 is an equidigital number, since it uses as much as digits as its factorization.

23121473 is an evil number, because the sum of its binary digits is even.

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

The square root of 23121473 is about 4808.4792814361. The cubic root of 23121473 is about 284.8864757666.

The spelling of 23121473 in words is "twenty-three million, one hundred twenty-one thousand, four hundred seventy-three".