23722749 has 6 divisors (see below), whose sum is σ = 34266206. Its totient is φ = 15815160.

The previous prime is 23722709. The next prime is 23722753. The reversal of 23722749 is 94722732.

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 1397124 = 4725^2 + 1182^2 .

It is not a de Polignac number, because 23722749 - 2¹³ = 23714557 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 (23722709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1317922 + ... + 1317939.

Almost surely, 2^23722749 is an apocalyptic number.

It is an amenable number.

23722749 is a deficient number, since it is larger than the sum of its proper divisors (10543457).

23722749 is a wasteful number, since it uses less digits than its factorization.

23722749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635867 (or 2635864 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 23722749 is about 4870.6004763273. The cubic root of 23722749 is about 287.3348727883.

The spelling of 23722749 in words is "twenty-three million, seven hundred twenty-two thousand, seven hundred forty-nine".