40431977 has 2 divisors, whose sum is σ = 40431978. Its totient is φ = 40431976.

The previous prime is 40431931. The next prime is 40432013. The reversal of 40431977 is 77913404.

40431977 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 can be written as a sum of positive squares in only one way, i.e., 34762816 + 5669161 = 5896^2 + 2381^2 .

It is a cyclic number.

It is not a de Polignac number, because 40431977 - 2⁶ = 40431913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40431917) 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, 20215988 + 20215989.

It is an arithmetic number, because the mean of its divisors is an integer number (20215989).

Almost surely, 2^40431977 is an apocalyptic number.

It is an amenable number.

40431977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431977 is an equidigital number, since it uses as much as digits as its factorization.

40431977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 40431977 is about 6358.6143930891. The cubic root of 40431977 is about 343.2219010815.

The spelling of 40431977 in words is "forty million, four hundred thirty-one thousand, nine hundred seventy-seven".