39642223 has 4 divisors (see below), whose sum is σ = 39660760. Its totient is φ = 39623688.

The previous prime is 39642191. The next prime is 39642233. The reversal of 39642223 is 32224693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32224693 = 227 ⋅141959.

It is a cyclic number.

It is not a de Polignac number, because 39642223 - 2⁵ = 39642191 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 (39642233) 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, 5568 + ... + 10501.

It is an arithmetic number, because the mean of its divisors is an integer number (9915190).

Almost surely, 2^39642223 is an apocalyptic number.

39642223 is a deficient number, since it is larger than the sum of its proper divisors (18537).

39642223 is a wasteful number, since it uses less digits than its factorization.

39642223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18536.

The product of its digits is 15552, while the sum is 31.

The square root of 39642223 is about 6296.2070328095. The cubic root of 39642223 is about 340.9724839698.

The spelling of 39642223 in words is "thirty-nine million, six hundred forty-two thousand, two hundred twenty-three".