23789421 has 18 divisors (see below), whose sum is σ = 35060298. Its totient is φ = 15543840.

The previous prime is 23789419. The next prime is 23789497. The reversal of 23789421 is 12498732.

It can be written as a sum of positive squares in 3 ways, for example, as 9455625 + 14333796 = 3075^2 + 3786^2 .

It is not a de Polignac number, because 23789421 - 2¹ = 23789419 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23789411) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24811 + ... + 25751.

Almost surely, 2^23789421 is an apocalyptic number.

It is an amenable number.

23789421 is a deficient number, since it is larger than the sum of its proper divisors (11270877).

23789421 is an equidigital number, since it uses as much as digits as its factorization.

23789421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 997 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 23789421 is about 4877.4400047566. The cubic root of 23789421 is about 287.6038027189.

The spelling of 23789421 in words is "twenty-three million, seven hundred eighty-nine thousand, four hundred twenty-one".