40643179 has 2 divisors, whose sum is σ = 40643180. Its totient is φ = 40643178.

The previous prime is 40643171. The next prime is 40643219. The reversal of 40643179 is 97134604.

It is a happy number.

40643179 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 is a cyclic number.

It is not a de Polignac number, because 40643179 - 2³ = 40643171 is a prime.

It is not a weakly prime, because it can be changed into another prime (40643171) 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, 20321589 + 20321590.

It is an arithmetic number, because the mean of its divisors is an integer number (20321590).

Almost surely, 2^40643179 is an apocalyptic number.

40643179 is a deficient number, since it is larger than the sum of its proper divisors (1).

40643179 is an equidigital number, since it uses as much as digits as its factorization.

40643179 is an odious number, because the sum of its binary digits is odd.

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

The square root of 40643179 is about 6375.2003105785. The cubic root of 40643179 is about 343.8184857926.

The spelling of 40643179 in words is "forty million, six hundred forty-three thousand, one hundred seventy-nine".