40085977 has 2 divisors, whose sum is σ = 40085978. Its totient is φ = 40085976.

The previous prime is 40085939. The next prime is 40085989. The reversal of 40085977 is 77958004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25918281 + 14167696 = 5091^2 + 3764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40085977 is a prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20042988 + 20042989.

It is an arithmetic number, because the mean of its divisors is an integer number (20042989).

Almost surely, 2^40085977 is an apocalyptic number.

It is an amenable number.

40085977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40085977 is an equidigital number, since it uses as much as digits as its factorization.

40085977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 40085977 is about 6331.3487504638. The cubic root of 40085977 is about 342.2400449894.

The spelling of 40085977 in words is "forty million, eighty-five thousand, nine hundred seventy-seven".