40869319 has 2 divisors, whose sum is σ = 40869320. Its totient is φ = 40869318.

The previous prime is 40869317. The next prime is 40869331. The reversal of 40869319 is 91396804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40869319 - 2¹ = 40869317 is a prime.

It is a super-2 number, since 2×40869319² = 3340602471047522, which contains 22 as substring.

Together with 40869317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40869317) 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, 20434659 + 20434660.

It is an arithmetic number, because the mean of its divisors is an integer number (20434660).

Almost surely, 2^40869319 is an apocalyptic number.

40869319 is a deficient number, since it is larger than the sum of its proper divisors (1).

40869319 is an equidigital number, since it uses as much as digits as its factorization.

40869319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 40869319 is about 6392.9116214758. The cubic root of 40869319 is about 344.4549792554.

The spelling of 40869319 in words is "forty million, eight hundred sixty-nine thousand, three hundred nineteen".