40997647 has 4 divisors (see below), whose sum is σ = 41025600. Its totient is φ = 40969696.

The previous prime is 40997609. The next prime is 40997653. The reversal of 40997647 is 74679904.

40997647 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 40997647 - 2⁷ = 40997519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40997597 and 40997606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40997657) 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, 11647 + ... + 14752.

It is an arithmetic number, because the mean of its divisors is an integer number (10256400).

Almost surely, 2^40997647 is an apocalyptic number.

40997647 is a deficient number, since it is larger than the sum of its proper divisors (27953).

40997647 is a wasteful number, since it uses less digits than its factorization.

40997647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27952.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 40997647 is about 6402.9404963657. The cubic root of 40997647 is about 344.8151274445.

The spelling of 40997647 in words is "forty million, nine hundred ninety-seven thousand, six hundred forty-seven".