39948479 has 4 divisors (see below), whose sum is σ = 39985176. Its totient is φ = 39911784.

The previous prime is 39948439. The next prime is 39948509. The reversal of 39948479 is 97484993.

It is a happy number.

39948479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39948479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39948479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39948439) 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 3 ways as a sum of consecutive naturals, for example, 16664 + ... + 18909.

It is an arithmetic number, because the mean of its divisors is an integer number (9996294).

Almost surely, 2^39948479 is an apocalyptic number.

39948479 is a deficient number, since it is larger than the sum of its proper divisors (36697).

39948479 is a wasteful number, since it uses less digits than its factorization.

39948479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36696.

The product of its digits is 1959552, while the sum is 53.

The square root of 39948479 is about 6320.4809152469. The cubic root of 39948479 is about 341.8482934642.

The spelling of 39948479 in words is "thirty-nine million, nine hundred forty-eight thousand, four hundred seventy-nine".