40777771 has 2 divisors, whose sum is σ = 40777772. Its totient is φ = 40777770.

The previous prime is 40777769. The next prime is 40777783. The reversal of 40777771 is 17777704.

It is a happy number.

40777771 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 40777771 - 2¹ = 40777769 is a prime.

Together with 40777769, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40777721) 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, 20388885 + 20388886.

It is an arithmetic number, because the mean of its divisors is an integer number (20388886).

Almost surely, 2^40777771 is an apocalyptic number.

40777771 is a deficient number, since it is larger than the sum of its proper divisors (1).

40777771 is an equidigital number, since it uses as much as digits as its factorization.

40777771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67228, while the sum is 40.

The square root of 40777771 is about 6385.7474895270. The cubic root of 40777771 is about 344.1975918863.

The spelling of 40777771 in words is "forty million, seven hundred seventy-seven thousand, seven hundred seventy-one".