40143769 has 2 divisors, whose sum is σ = 40143770. Its totient is φ = 40143768.

The previous prime is 40143757. The next prime is 40143773. The reversal of 40143769 is 96734104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37063744 + 3080025 = 6088^2 + 1755^2 .

It is a cyclic number.

It is not a de Polignac number, because 40143769 - 2⁷ = 40143641 is a prime.

It is a super-2 number, since 2×40143769² = 3223044379050722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40143799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071884 + 20071885.

It is an arithmetic number, because the mean of its divisors is an integer number (20071885).

Almost surely, 2^40143769 is an apocalyptic number.

It is an amenable number.

40143769 is a deficient number, since it is larger than the sum of its proper divisors (1).

40143769 is an equidigital number, since it uses as much as digits as its factorization.

40143769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 40143769 is about 6335.9110631384. The cubic root of 40143769 is about 342.4044353054.

The spelling of 40143769 in words is "forty million, one hundred forty-three thousand, seven hundred sixty-nine".