23409457 has 2 divisors, whose sum is σ = 23409458. Its totient is φ = 23409456.

The previous prime is 23409437. The next prime is 23409473. The reversal of 23409457 is 75490432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 3837681 = 4424^2 + 1959^2 .

It is a cyclic number.

It is not a de Polignac number, because 23409457 - 2¹⁹ = 22885169 is a prime.

It is not a weakly prime, because it can be changed into another prime (23409427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11704728 + 11704729.

It is an arithmetic number, because the mean of its divisors is an integer number (11704729).

Almost surely, 2^23409457 is an apocalyptic number.

It is an amenable number.

23409457 is a deficient number, since it is larger than the sum of its proper divisors (1).

23409457 is an equidigital number, since it uses as much as digits as its factorization.

23409457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 23409457 is about 4838.3320473072. The cubic root of 23409457 is about 286.0643774096.

Adding to 23409457 its reverse (75490432), we get a palindrome (98899889).

The spelling of 23409457 in words is "twenty-three million, four hundred nine thousand, four hundred fifty-seven".