40985887 has 2 divisors, whose sum is σ = 40985888. Its totient is φ = 40985886.

The previous prime is 40985851. The next prime is 40985897. The reversal of 40985887 is 78858904.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40985887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40985887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40985807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20492943 + 20492944.

It is an arithmetic number, because the mean of its divisors is an integer number (20492944).

Almost surely, 2^40985887 is an apocalyptic number.

40985887 is a deficient number, since it is larger than the sum of its proper divisors (1).

40985887 is an equidigital number, since it uses as much as digits as its factorization.

40985887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 40985887 is about 6402.0221024298. The cubic root of 40985887 is about 344.7821547092.

The spelling of 40985887 in words is "forty million, nine hundred eighty-five thousand, eight hundred eighty-seven".