40165919 has 2 divisors, whose sum is σ = 40165920. Its totient is φ = 40165918.

The previous prime is 40165903. The next prime is 40165921. The reversal of 40165919 is 91956104.

40165919 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 is a cyclic number.

It is not a de Polignac number, because 40165919 - 2⁴ = 40165903 is a prime.

It is a super-2 number, since 2×40165919² = 3226602098229122, which contains 22 as substring.

Together with 40165921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40165949) 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, 20082959 + 20082960.

It is an arithmetic number, because the mean of its divisors is an integer number (20082960).

Almost surely, 2^40165919 is an apocalyptic number.

40165919 is a deficient number, since it is larger than the sum of its proper divisors (1).

40165919 is an equidigital number, since it uses as much as digits as its factorization.

40165919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 40165919 is about 6337.6587948548. The cubic root of 40165919 is about 342.4673995291.

The spelling of 40165919 in words is "forty million, one hundred sixty-five thousand, nine hundred nineteen".