23021149 has 2 divisors, whose sum is σ = 23021150. Its totient is φ = 23021148.

The previous prime is 23021147. The next prime is 23021161. The reversal of 23021149 is 94112032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 5673924 = 4165^2 + 2382^2 .

It is a cyclic number.

It is not a de Polignac number, because 23021149 - 2¹ = 23021147 is a prime.

Together with 23021147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23021147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11510574 + 11510575.

It is an arithmetic number, because the mean of its divisors is an integer number (11510575).

Almost surely, 2^23021149 is an apocalyptic number.

It is an amenable number.

23021149 is a deficient number, since it is larger than the sum of its proper divisors (1).

23021149 is an equidigital number, since it uses as much as digits as its factorization.

23021149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 23021149 is about 4798.0359523455. The cubic root of 23021149 is about 284.4738378653.

The spelling of 23021149 in words is "twenty-three million, twenty-one thousand, one hundred forty-nine".