40209317 has 4 divisors (see below), whose sum is σ = 40289760. Its totient is φ = 40128876.

The previous prime is 40209293. The next prime is 40209371. The reversal of 40209317 is 71390204.

40209317 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40209317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40202317) 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, 39467 + ... + 40472.

It is an arithmetic number, because the mean of its divisors is an integer number (10072440).

Almost surely, 2^40209317 is an apocalyptic number.

It is an amenable number.

40209317 is a deficient number, since it is larger than the sum of its proper divisors (80443).

40209317 is an equidigital number, since it uses as much as digits as its factorization.

40209317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80442.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 40209317 is about 6341.0816900589. The cubic root of 40209317 is about 342.5906968501.

The spelling of 40209317 in words is "forty million, two hundred nine thousand, three hundred seventeen".