23954989 has 4 divisors (see below), whose sum is σ = 25364124. Its totient is φ = 22545856.

The previous prime is 23954977. The next prime is 23955013. The reversal of 23954989 is 98945932.

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 10778089 + 13176900 = 3283^2 + 3630^2 .

It is a cyclic number.

It is not a de Polignac number, because 23954989 - 2²¹ = 21857837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23954929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704542 + ... + 704575.

It is an arithmetic number, because the mean of its divisors is an integer number (6341031).

Almost surely, 2^23954989 is an apocalyptic number.

It is an amenable number.

23954989 is a deficient number, since it is larger than the sum of its proper divisors (1409135).

23954989 is a wasteful number, since it uses less digits than its factorization.

23954989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409134.

The product of its digits is 699840, while the sum is 49.

The square root of 23954989 is about 4894.3834136692. The cubic root of 23954989 is about 288.2694759480.

The spelling of 23954989 in words is "twenty-three million, nine hundred fifty-four thousand, nine hundred eighty-nine".