40545317 has 2 divisors, whose sum is σ = 40545318. Its totient is φ = 40545316.

The previous prime is 40545313. The next prime is 40545341. The reversal of 40545317 is 71354504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33570436 + 6974881 = 5794^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 40545317 - 2² = 40545313 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40545317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40545311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20272658 + 20272659.

It is an arithmetic number, because the mean of its divisors is an integer number (20272659).

Almost surely, 2^40545317 is an apocalyptic number.

It is an amenable number.

40545317 is a deficient number, since it is larger than the sum of its proper divisors (1).

40545317 is an equidigital number, since it uses as much as digits as its factorization.

40545317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 40545317 is about 6367.5204750358. The cubic root of 40545317 is about 343.5423114797.

The spelling of 40545317 in words is "forty million, five hundred forty-five thousand, three hundred seventeen".