39789923 has 4 divisors (see below), whose sum is σ = 40043520. Its totient is φ = 39536328.

The previous prime is 39789913. The next prime is 39789929. The reversal of 39789923 is 32998793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32998793 = 353 ⋅93481.

It is a cyclic number.

It is not a de Polignac number, because 39789923 - 2⁴ = 39789907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39789929) 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, 126563 + ... + 126876.

It is an arithmetic number, because the mean of its divisors is an integer number (10010880).

Almost surely, 2^39789923 is an apocalyptic number.

39789923 is a deficient number, since it is larger than the sum of its proper divisors (253597).

39789923 is a wasteful number, since it uses less digits than its factorization.

39789923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253596.

The product of its digits is 734832, while the sum is 50.

The square root of 39789923 is about 6307.9254117340. The cubic root of 39789923 is about 341.3954271097.

The spelling of 39789923 in words is "thirty-nine million, seven hundred eighty-nine thousand, nine hundred twenty-three".