40445189 has 2 divisors, whose sum is σ = 40445190. Its totient is φ = 40445188.

The previous prime is 40445179. The next prime is 40445203. The reversal of 40445189 is 98154404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40424164 + 21025 = 6358^2 + 145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40445189 is a prime.

It is a Chen prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40445179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222594 + 20222595.

It is an arithmetic number, because the mean of its divisors is an integer number (20222595).

Almost surely, 2^40445189 is an apocalyptic number.

It is an amenable number.

40445189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40445189 is an equidigital number, since it uses as much as digits as its factorization.

40445189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 40445189 is about 6359.6532138160. The cubic root of 40445189 is about 343.2592820050.

The spelling of 40445189 in words is "forty million, four hundred forty-five thousand, one hundred eighty-nine".