39947499 has 24 divisors (see below), whose sum is σ = 61780992. Its totient is φ = 25767720.

The previous prime is 39947491. The next prime is 39947521. The reversal of 39947499 is 99474993.

39947499 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 39947499 - 2³ = 39947491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39947491) 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 23 ways as a sum of consecutive naturals, for example, 4882 + ... + 10184.

It is an arithmetic number, because the mean of its divisors is an integer number (2574208).

Almost surely, 2^39947499 is an apocalyptic number.

39947499 is a deficient number, since it is larger than the sum of its proper divisors (21833493).

39947499 is an equidigital number, since it uses as much as digits as its factorization.

39947499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349 (or 5337 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 39947499 is about 6320.4033890251. The cubic root of 39947499 is about 341.8454980798.

The spelling of 39947499 in words is "thirty-nine million, nine hundred forty-seven thousand, four hundred ninety-nine".