23390789 has 4 divisors (see below), whose sum is σ = 23413740. Its totient is φ = 23367840.

The previous prime is 23390779. The next prime is 23390797. The reversal of 23390789 is 98709332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3880900 + 19509889 = 1970^2 + 4417^2 .

It is a cyclic number.

It is not a de Polignac number, because 23390789 - 2²⁰ = 22342213 is a prime.

It is a super-3 number, since 3×23390789³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23390779) 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, 9872 + ... + 12009.

It is an arithmetic number, because the mean of its divisors is an integer number (5853435).

Almost surely, 2^23390789 is an apocalyptic number.

It is an amenable number.

23390789 is a deficient number, since it is larger than the sum of its proper divisors (22951).

23390789 is a wasteful number, since it uses less digits than its factorization.

23390789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22950.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 23390789 is about 4836.4024853190. The cubic root of 23390789 is about 285.9883159848.

The spelling of 23390789 in words is "twenty-three million, three hundred ninety thousand, seven hundred eighty-nine".