23216389 has 4 divisors (see below), whose sum is σ = 26533024. Its totient is φ = 19899756.

The previous prime is 23216387. The next prime is 23216393. The reversal of 23216389 is 98361232.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23216389 - 2¹ = 23216387 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23216381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658307 + ... + 1658320.

It is an arithmetic number, because the mean of its divisors is an integer number (6633256).

Almost surely, 2^23216389 is an apocalyptic number.

It is an amenable number.

23216389 is a deficient number, since it is larger than the sum of its proper divisors (3316635).

23216389 is an equidigital number, since it uses as much as digits as its factorization.

23216389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316634.

The product of its digits is 15552, while the sum is 34.

The square root of 23216389 is about 4818.3388216272. The cubic root of 23216389 is about 285.2757728766.

The spelling of 23216389 in words is "twenty-three million, two hundred sixteen thousand, three hundred eighty-nine".