40997785 has 4 divisors (see below), whose sum is σ = 49197348. Its totient is φ = 32798224.

The previous prime is 40997777. The next prime is 40997807. The reversal of 40997785 is 58779904.

It is a happy number.

40997785 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 can be written as a sum of positive squares in 2 ways, for example, as 16475481 + 24522304 = 4059^2 + 4952^2 .

It is a cyclic number.

It is not a de Polignac number, because 40997785 - 2³ = 40997777 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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, 4099774 + ... + 4099783.

It is an arithmetic number, because the mean of its divisors is an integer number (12299337).

Almost surely, 2^40997785 is an apocalyptic number.

It is an amenable number.

40997785 is a deficient number, since it is larger than the sum of its proper divisors (8199563).

40997785 is an equidigital number, since it uses as much as digits as its factorization.

40997785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8199562.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 40997785 is about 6402.9512726554. The cubic root of 40997785 is about 344.8155143320.

The spelling of 40997785 in words is "forty million, nine hundred ninety-seven thousand, seven hundred eighty-five".