23783149 has 4 divisors (see below), whose sum is σ = 25612636. Its totient is φ = 21953664.

The previous prime is 23783143. The next prime is 23783189. The reversal of 23783149 is 94138732.

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 6502500 + 17280649 = 2550^2 + 4157^2 .

It is a cyclic number.

It is not a de Polignac number, because 23783149 - 2³ = 23783141 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 (23783141) 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, 914724 + ... + 914749.

It is an arithmetic number, because the mean of its divisors is an integer number (6403159).

Almost surely, 2^23783149 is an apocalyptic number.

It is an amenable number.

23783149 is a deficient number, since it is larger than the sum of its proper divisors (1829487).

23783149 is a wasteful number, since it uses less digits than its factorization.

23783149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829486.

The product of its digits is 36288, while the sum is 37.

The square root of 23783149 is about 4876.7970021316. The cubic root of 23783149 is about 287.5785252422.

It can be divided in two parts, 23783 and 149, that added together give a palindrome (23932).

The spelling of 23783149 in words is "twenty-three million, seven hundred eighty-three thousand, one hundred forty-nine".