40159859 has 2 divisors, whose sum is σ = 40159860. Its totient is φ = 40159858.

The previous prime is 40159853. The next prime is 40159871. The reversal of 40159859 is 95895104.

It is a happy number.

40159859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40159859 - 2¹² = 40155763 is a prime.

It is a super-2 number, since 2×40159859² = 3225628549799762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40159853) 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 as a sum of consecutive naturals, namely, 20079929 + 20079930.

It is an arithmetic number, because the mean of its divisors is an integer number (20079930).

Almost surely, 2^40159859 is an apocalyptic number.

40159859 is a deficient number, since it is larger than the sum of its proper divisors (1).

40159859 is an equidigital number, since it uses as much as digits as its factorization.

40159859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 40159859 is about 6337.1806822908. The cubic root of 40159859 is about 342.4501755004.

The spelling of 40159859 in words is "forty million, one hundred fifty-nine thousand, eight hundred fifty-nine".