23209057 has 2 divisors, whose sum is σ = 23209058. Its totient is φ = 23209056.

The previous prime is 23209031. The next prime is 23209061. The reversal of 23209057 is 75090232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 7177041 = 4004^2 + 2679^2 .

It is a cyclic number.

It is not a de Polignac number, because 23209057 - 2¹⁹ = 22684769 is a prime.

It is not a weakly prime, because it can be changed into another prime (23209357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11604528 + 11604529.

It is an arithmetic number, because the mean of its divisors is an integer number (11604529).

Almost surely, 2^23209057 is an apocalyptic number.

It is an amenable number.

23209057 is a deficient number, since it is larger than the sum of its proper divisors (1).

23209057 is an equidigital number, since it uses as much as digits as its factorization.

23209057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 23209057 is about 4817.5779184150. The cubic root of 23209057 is about 285.2457386022.

Adding to 23209057 its reverse (75090232), we get a palindrome (98299289).

The spelling of 23209057 in words is "twenty-three million, two hundred nine thousand, fifty-seven".