40395977 has 2 divisors, whose sum is σ = 40395978. Its totient is φ = 40395976.

The previous prime is 40395959. The next prime is 40395991. The reversal of 40395977 is 77959304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38142976 + 2253001 = 6176^2 + 1501^2 .

It is a cyclic number.

It is not a de Polignac number, because 40395977 - 2⁸ = 40395721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40395907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20197988 + 20197989.

It is an arithmetic number, because the mean of its divisors is an integer number (20197989).

Almost surely, 2^40395977 is an apocalyptic number.

It is an amenable number.

40395977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40395977 is an equidigital number, since it uses as much as digits as its factorization.

40395977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 40395977 is about 6355.7829572760. The cubic root of 40395977 is about 343.1200043621.

The spelling of 40395977 in words is "forty million, three hundred ninety-five thousand, nine hundred seventy-seven".