40684047 has 4 divisors (see below), whose sum is σ = 54245400. Its totient is φ = 27122696.

The previous prime is 40683991. The next prime is 40684051. The reversal of 40684047 is 74048604.

40684047 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 not a de Polignac number, because 40684047 - 2⁶ = 40683983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40683999 and 40684017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40684057) 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, 6780672 + ... + 6780677.

It is an arithmetic number, because the mean of its divisors is an integer number (13561350).

Almost surely, 2^40684047 is an apocalyptic number.

40684047 is a deficient number, since it is larger than the sum of its proper divisors (13561353).

40684047 is a wasteful number, since it uses less digits than its factorization.

40684047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13561352.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 40684047 is about 6378.4047378635. The cubic root of 40684047 is about 343.9336873034.

The spelling of 40684047 in words is "forty million, six hundred eighty-four thousand, forty-seven".