23122409 has 2 divisors, whose sum is σ = 23122410. Its totient is φ = 23122408.

The previous prime is 23122403. The next prime is 23122427. The reversal of 23122409 is 90422132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 3052009 = 4480^2 + 1747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23122409 is a prime.

It is not a weakly prime, because it can be changed into another prime (23122403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561204 + 11561205.

It is an arithmetic number, because the mean of its divisors is an integer number (11561205).

Almost surely, 2^23122409 is an apocalyptic number.

It is an amenable number.

23122409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23122409 is an equidigital number, since it uses as much as digits as its factorization.

23122409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 23122409 is about 4808.5766085194. The cubic root of 23122409 is about 284.8903199586.

The spelling of 23122409 in words is "twenty-three million, one hundred twenty-two thousand, four hundred nine".