40640177 has 2 divisors, whose sum is σ = 40640178. Its totient is φ = 40640176.

The previous prime is 40640167. The next prime is 40640219. The reversal of 40640177 is 77104604.

It is a happy number.

40640177 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 can be written as a sum of positive squares in only one way, i.e., 24245776 + 16394401 = 4924^2 + 4049^2 .

It is a cyclic number.

It is not a de Polignac number, because 40640177 - 2⁴ = 40640161 is a prime.

It is a Chen prime.

It is equal to p_2470169 and since 40640177 and 2470169 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40640137) 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, 20320088 + 20320089.

It is an arithmetic number, because the mean of its divisors is an integer number (20320089).

Almost surely, 2^40640177 is an apocalyptic number.

It is an amenable number.

40640177 is a deficient number, since it is larger than the sum of its proper divisors (1).

40640177 is an equidigital number, since it uses as much as digits as its factorization.

40640177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 40640177 is about 6374.9648626483. The cubic root of 40640177 is about 343.8100205057.

The spelling of 40640177 in words is "forty million, six hundred forty thousand, one hundred seventy-seven".