23078189 has 2 divisors, whose sum is σ = 23078190. Its totient is φ = 23078188.

The previous prime is 23078183. The next prime is 23078201. The reversal of 23078189 is 98187032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22250089 + 828100 = 4717^2 + 910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23078189 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23078183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11539094 + 11539095.

It is an arithmetic number, because the mean of its divisors is an integer number (11539095).

Almost surely, 2^23078189 is an apocalyptic number.

It is an amenable number.

23078189 is a deficient number, since it is larger than the sum of its proper divisors (1).

23078189 is an equidigital number, since it uses as much as digits as its factorization.

23078189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 23078189 is about 4803.9763737970. The cubic root of 23078189 is about 284.7085930845.

The spelling of 23078189 in words is "twenty-three million, seventy-eight thousand, one hundred eighty-nine".