39849723 has 6 divisors (see below), whose sum is σ = 57560724. Its totient is φ = 26566476.

The previous prime is 39849709. The next prime is 39849739. The reversal of 39849723 is 32794893.

It is a happy number.

39849723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39849723 - 2⁶ = 39849659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39849763) 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 5 ways as a sum of consecutive naturals, for example, 2213865 + ... + 2213882.

It is an arithmetic number, because the mean of its divisors is an integer number (9593454).

Almost surely, 2^39849723 is an apocalyptic number.

39849723 is a deficient number, since it is larger than the sum of its proper divisors (17711001).

39849723 is a wasteful number, since it uses less digits than its factorization.

39849723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427753 (or 4427750 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 39849723 is about 6312.6637008477. The cubic root of 39849723 is about 341.5663684446.

The spelling of 39849723 in words is "thirty-nine million, eight hundred forty-nine thousand, seven hundred twenty-three".