39747947 has 8 divisors (see below), whose sum is σ = 40896576. Its totient is φ = 38612032.

The previous prime is 39747941. The next prime is 39747949. The reversal of 39747947 is 74974793.

39747947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39747947 - 2⁴ = 39747931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39747895 and 39747904.

It is not an unprimeable number, because it can be changed into a prime (39747941) 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 7 ways as a sum of consecutive naturals, for example, 3353 + ... + 9525.

It is an arithmetic number, because the mean of its divisors is an integer number (5112072).

Almost surely, 2^39747947 is an apocalyptic number.

39747947 is a deficient number, since it is larger than the sum of its proper divisors (1148629).

39747947 is a wasteful number, since it uses less digits than its factorization.

39747947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357.

The product of its digits is 1333584, while the sum is 50.

The square root of 39747947 is about 6304.5972908664. The cubic root of 39747947 is about 341.2753342523.

It can be divided in two parts, 3974 and 7947, that multiplied together give a triangular number (31581378 = T₇₉₄₇).

The spelling of 39747947 in words is "thirty-nine million, seven hundred forty-seven thousand, nine hundred forty-seven".