40289761 has 2 divisors, whose sum is σ = 40289762. Its totient is φ = 40289760.

The previous prime is 40289719. The next prime is 40289771. The reversal of 40289761 is 16798204.

40289761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 360000 = 6319^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 40289761 - 2¹¹ = 40287713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40289761.

It is not a weakly prime, because it can be changed into another prime (40289701) 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, 20144880 + 20144881.

It is an arithmetic number, because the mean of its divisors is an integer number (20144881).

Almost surely, 2^40289761 is an apocalyptic number.

It is an amenable number.

40289761 is a deficient number, since it is larger than the sum of its proper divisors (1).

40289761 is an equidigital number, since it uses as much as digits as its factorization.

40289761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 40289761 is about 6347.4216025092. The cubic root of 40289761 is about 342.8190104995.

The spelling of 40289761 in words is "forty million, two hundred eighty-nine thousand, seven hundred sixty-one".