40791869 has 2 divisors, whose sum is σ = 40791870. Its totient is φ = 40791868.

The previous prime is 40791827. The next prime is 40791923. The reversal of 40791869 is 96819704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31416025 + 9375844 = 5605^2 + 3062^2 .

It is a cyclic number.

It is not a de Polignac number, because 40791869 - 2¹⁶ = 40726333 is a prime.

It is a super-2 number, since 2×40791869² = 3327953153026322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40791809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20395934 + 20395935.

It is an arithmetic number, because the mean of its divisors is an integer number (20395935).

Almost surely, 2^40791869 is an apocalyptic number.

It is an amenable number.

40791869 is a deficient number, since it is larger than the sum of its proper divisors (1).

40791869 is an equidigital number, since it uses as much as digits as its factorization.

40791869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 40791869 is about 6386.8512586407. The cubic root of 40791869 is about 344.2372535159.

The spelling of 40791869 in words is "forty million, seven hundred ninety-one thousand, eight hundred sixty-nine".