40020187 has 2 divisors, whose sum is σ = 40020188. Its totient is φ = 40020186.

The previous prime is 40020181. The next prime is 40020191. The reversal of 40020187 is 78102004.

40020187 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40020187 is a prime.

It is not a weakly prime, because it can be changed into another prime (40020181) 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, 20010093 + 20010094.

It is an arithmetic number, because the mean of its divisors is an integer number (20010094).

Almost surely, 2^40020187 is an apocalyptic number.

40020187 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020187 is an equidigital number, since it uses as much as digits as its factorization.

40020187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 40020187 is about 6326.1510415102. The cubic root of 40020187 is about 342.0527118004.

The spelling of 40020187 in words is "forty million, twenty thousand, one hundred eighty-seven".