40027189 has 2 divisors, whose sum is σ = 40027190. Its totient is φ = 40027188.

The previous prime is 40027187. The next prime is 40027213. The reversal of 40027189 is 98172004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28804689 + 11222500 = 5367^2 + 3350^2 .

It is a cyclic number.

It is not a de Polignac number, because 40027189 - 2¹ = 40027187 is a prime.

Together with 40027187, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40027189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40027187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20013594 + 20013595.

It is an arithmetic number, because the mean of its divisors is an integer number (20013595).

Almost surely, 2^40027189 is an apocalyptic number.

It is an amenable number.

40027189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40027189 is an equidigital number, since it uses as much as digits as its factorization.

40027189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 40027189 is about 6326.7044343797. The cubic root of 40027189 is about 342.0726593452.

The spelling of 40027189 in words is "forty million, twenty-seven thousand, one hundred eighty-nine".