40340917 has 4 divisors (see below), whose sum is σ = 40407340. Its totient is φ = 40274496.

The previous prime is 40340903. The next prime is 40340953. The reversal of 40340917 is 71904304.

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 16924996 + 23415921 = 4114^2 + 4839^2 .

It is a cyclic number.

It is not a de Polignac number, because 40340917 - 2¹¹ = 40338869 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 (40340957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32292 + ... + 33517.

It is an arithmetic number, because the mean of its divisors is an integer number (10101835).

Almost surely, 2^40340917 is an apocalyptic number.

It is an amenable number.

40340917 is a deficient number, since it is larger than the sum of its proper divisors (66423).

40340917 is an equidigital number, since it uses as much as digits as its factorization.

40340917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66422.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 40340917 is about 6351.4499919310. The cubic root of 40340917 is about 342.9640418237.

The spelling of 40340917 in words is "forty million, three hundred forty thousand, nine hundred seventeen".