23542009 has 2 divisors, whose sum is σ = 23542010. Its totient is φ = 23542008.

The previous prime is 23541983. The next prime is 23542019. The reversal of 23542009 is 90024532.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 10582009 = 3600^2 + 3253^2 .

It is a cyclic number.

It is not a de Polignac number, because 23542009 - 2²³ = 15153401 is a prime.

It is not a weakly prime, because it can be changed into another prime (23542019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11771004 + 11771005.

It is an arithmetic number, because the mean of its divisors is an integer number (11771005).

Almost surely, 2^23542009 is an apocalyptic number.

It is an amenable number.

23542009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23542009 is an equidigital number, since it uses as much as digits as its factorization.

23542009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 23542009 is about 4852.0108202682. The cubic root of 23542009 is about 286.6032915308.

The spelling of 23542009 in words is "twenty-three million, five hundred forty-two thousand, nine".