39789479 has 4 divisors (see below), whose sum is σ = 41161560. Its totient is φ = 38417400.

The previous prime is 39789473. The next prime is 39789509. The reversal of 39789479 is 97498793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97498793 = 7 ⋅13928399.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39789479 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 (39789473) 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, 685997 + ... + 686054.

It is an arithmetic number, because the mean of its divisors is an integer number (10290390).

Almost surely, 2^39789479 is an apocalyptic number.

39789479 is a deficient number, since it is larger than the sum of its proper divisors (1372081).

39789479 is a wasteful number, since it uses less digits than its factorization.

39789479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372080.

The product of its digits is 3429216, while the sum is 56.

The square root of 39789479 is about 6307.8902178145. The cubic root of 39789479 is about 341.3941572728.

The spelling of 39789479 in words is "thirty-nine million, seven hundred eighty-nine thousand, four hundred seventy-nine".