40680187 has 2 divisors, whose sum is σ = 40680188. Its totient is φ = 40680186.

The previous prime is 40680179. The next prime is 40680251. The reversal of 40680187 is 78108604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40680187 - 2³ = 40680179 is a prime.

It is a super-2 number, since 2×40680187² = 3309755228709938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40680137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20340093 + 20340094.

It is an arithmetic number, because the mean of its divisors is an integer number (20340094).

Almost surely, 2^40680187 is an apocalyptic number.

40680187 is a deficient number, since it is larger than the sum of its proper divisors (1).

40680187 is an equidigital number, since it uses as much as digits as its factorization.

40680187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 40680187 is about 6378.1021471908. The cubic root of 40680187 is about 343.9228097718.

The spelling of 40680187 in words is "forty million, six hundred eighty thousand, one hundred eighty-seven".