23047021 has 2 divisors, whose sum is σ = 23047022. Its totient is φ = 23047020.

The previous prime is 23047001. The next prime is 23047027. The reversal of 23047021 is 12074032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21058921 + 1988100 = 4589^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 23047021 - 2¹⁵ = 23014253 is a prime.

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 23047021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23047027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11523510 + 11523511.

It is an arithmetic number, because the mean of its divisors is an integer number (11523511).

Almost surely, 2^23047021 is an apocalyptic number.

It is an amenable number.

23047021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23047021 is an equidigital number, since it uses as much as digits as its factorization.

23047021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 23047021 is about 4800.7312984586. The cubic root of 23047021 is about 284.5803652986.

The spelling of 23047021 in words is "twenty-three million, forty-seven thousand, twenty-one".