23216789 has 2 divisors, whose sum is σ = 23216790. Its totient is φ = 23216788.

The previous prime is 23216779. The next prime is 23216813. The reversal of 23216789 is 98761232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18190225 + 5026564 = 4265^2 + 2242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23216789 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 (23216759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11608394 + 11608395.

It is an arithmetic number, because the mean of its divisors is an integer number (11608395).

Almost surely, 2^23216789 is an apocalyptic number.

It is an amenable number.

23216789 is a deficient number, since it is larger than the sum of its proper divisors (1).

23216789 is an equidigital number, since it uses as much as digits as its factorization.

23216789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 23216789 is about 4818.3803295298. The cubic root of 23216789 is about 285.2774112257.

The spelling of 23216789 in words is "twenty-three million, two hundred sixteen thousand, seven hundred eighty-nine".