23409473 has 2 divisors, whose sum is σ = 23409474. Its totient is φ = 23409472.

The previous prime is 23409457. The next prime is 23409479. The reversal of 23409473 is 37490432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17783089 + 5626384 = 4217^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 23409473 - 2⁴ = 23409457 is a prime.

It is a super-2 number, since 2×23409473² = 1096006852275458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23409479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11704736 + 11704737.

It is an arithmetic number, because the mean of its divisors is an integer number (11704737).

Almost surely, 2^23409473 is an apocalyptic number.

It is an amenable number.

23409473 is a deficient number, since it is larger than the sum of its proper divisors (1).

23409473 is an equidigital number, since it uses as much as digits as its factorization.

23409473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 23409473 is about 4838.3337007693. Note that the first 3 decimals coincide. The cubic root of 23409473 is about 286.0644425831.

The spelling of 23409473 in words is "twenty-three million, four hundred nine thousand, four hundred seventy-three".