40434187 has 2 divisors, whose sum is σ = 40434188. Its totient is φ = 40434186.

The previous prime is 40434179. The next prime is 40434193. The reversal of 40434187 is 78143404.

40434187 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 not a de Polignac number, because 40434187 - 2³ = 40434179 is a prime.

It is not a weakly prime, because it can be changed into another prime (40434157) 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, 20217093 + 20217094.

It is an arithmetic number, because the mean of its divisors is an integer number (20217094).

Almost surely, 2^40434187 is an apocalyptic number.

40434187 is a deficient number, since it is larger than the sum of its proper divisors (1).

40434187 is an equidigital number, since it uses as much as digits as its factorization.

40434187 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 31.

The square root of 40434187 is about 6358.7881707130. The cubic root of 40434187 is about 343.2281544371.

The spelling of 40434187 in words is "forty million, four hundred thirty-four thousand, one hundred eighty-seven".