23573657 has 2 divisors, whose sum is σ = 23573658. Its totient is φ = 23573656.

The previous prime is 23573651. The next prime is 23573659. The reversal of 23573657 is 75637532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17673616 + 5900041 = 4204^2 + 2429^2 .

It is a cyclic number.

It is not a de Polignac number, because 23573657 - 2⁶ = 23573593 is a prime.

Together with 23573659, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23573657.

It is not a weakly prime, because it can be changed into another prime (23573651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11786828 + 11786829.

It is an arithmetic number, because the mean of its divisors is an integer number (11786829).

Almost surely, 2^23573657 is an apocalyptic number.

It is an amenable number.

23573657 is a deficient number, since it is larger than the sum of its proper divisors (1).

23573657 is an equidigital number, since it uses as much as digits as its factorization.

23573657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 38.

The square root of 23573657 is about 4855.2710531957. The cubic root of 23573657 is about 286.7316628958.

The spelling of 23573657 in words is "twenty-three million, five hundred seventy-three thousand, six hundred fifty-seven".