40384189 has 2 divisors, whose sum is σ = 40384190. Its totient is φ = 40384188.

The previous prime is 40384187. The next prime is 40384193. The reversal of 40384189 is 98148304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20403289 + 19980900 = 4517^2 + 4470^2 .

It is a cyclic number.

It is not a de Polignac number, because 40384189 - 2¹ = 40384187 is a prime.

Together with 40384187, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40384187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20192094 + 20192095.

It is an arithmetic number, because the mean of its divisors is an integer number (20192095).

Almost surely, 2^40384189 is an apocalyptic number.

It is an amenable number.

40384189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40384189 is an equidigital number, since it uses as much as digits as its factorization.

40384189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 40384189 is about 6354.8555451717. The cubic root of 40384189 is about 343.0866256909.

The spelling of 40384189 in words is "forty million, three hundred eighty-four thousand, one hundred eighty-nine".