39957047 has 8 divisors (see below), whose sum is σ = 44419200. Its totient is φ = 35693280.

The previous prime is 39957031. The next prime is 39957091. The reversal of 39957047 is 74075993.

It is a happy number.

39957047 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 39957047 - 2⁴ = 39957031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39956989 and 39957007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39957347) 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, 49172 + ... + 49977.

It is an arithmetic number, because the mean of its divisors is an integer number (5552400).

Almost surely, 2^39957047 is an apocalyptic number.

39957047 is a deficient number, since it is larger than the sum of its proper divisors (4462153).

39957047 is a wasteful number, since it uses less digits than its factorization.

39957047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99193.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 39957047 is about 6321.1586754329. The cubic root of 39957047 is about 341.8727311639.

The spelling of 39957047 in words is "thirty-nine million, nine hundred fifty-seven thousand, forty-seven".