40581769 has 2 divisors, whose sum is σ = 40581770. Its totient is φ = 40581768.

The previous prime is 40581767. The next prime is 40581773. The reversal of 40581769 is 96718504.

40581769 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 can be written as a sum of positive squares in only one way, i.e., 32947600 + 7634169 = 5740^2 + 2763^2 .

It is a cyclic number.

It is not a de Polignac number, because 40581769 - 2¹ = 40581767 is a prime.

It is a super-2 number, since 2×40581769² = 3293759950338722, which contains 22 as substring.

Together with 40581767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40581767) 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, 20290884 + 20290885.

It is an arithmetic number, because the mean of its divisors is an integer number (20290885).

Almost surely, 2^40581769 is an apocalyptic number.

It is an amenable number.

40581769 is a deficient number, since it is larger than the sum of its proper divisors (1).

40581769 is an equidigital number, since it uses as much as digits as its factorization.

40581769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 40581769 is about 6370.3821706394. The cubic root of 40581769 is about 343.6452337922.

The spelling of 40581769 in words is "forty million, five hundred eighty-one thousand, seven hundred sixty-nine".