40920617 has 4 divisors (see below), whose sum is σ = 40952916. Its totient is φ = 40888320.

The previous prime is 40920613. The next prime is 40920679. The reversal of 40920617 is 71602904.

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 40081561 + 839056 = 6331^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 40920617 - 2² = 40920613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40920617.

It is not an unprimeable number, because it can be changed into a prime (40920613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14168 + ... + 16809.

It is an arithmetic number, because the mean of its divisors is an integer number (10238229).

Almost surely, 2^40920617 is an apocalyptic number.

It is an amenable number.

40920617 is a deficient number, since it is larger than the sum of its proper divisors (32299).

40920617 is a wasteful number, since it uses less digits than its factorization.

40920617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32298.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 40920617 is about 6396.9224631849. The cubic root of 40920617 is about 344.5990356789.

The spelling of 40920617 in words is "forty million, nine hundred twenty thousand, six hundred seventeen".