63440189 has 2 divisors, whose sum is σ = 63440190. Its totient is φ = 63440188.

The previous prime is 63440171. The next prime is 63440207. The reversal of 63440189 is 98104436.

It is a balanced prime because it is at equal distance from previous prime (63440171) and next prime (63440207).

It can be written as a sum of positive squares in only one way, i.e., 58400164 + 5040025 = 7642^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 63440189 - 2¹⁶ = 63374653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63440119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31720094 + 31720095.

It is an arithmetic number, because the mean of its divisors is an integer number (31720095).

Almost surely, 2^63440189 is an apocalyptic number.

It is an amenable number.

63440189 is a deficient number, since it is larger than the sum of its proper divisors (1).

63440189 is an equidigital number, since it uses as much as digits as its factorization.

63440189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 63440189 is about 7964.9349652084. The cubic root of 63440189 is about 398.8303099805.

The spelling of 63440189 in words is "sixty-three million, four hundred forty thousand, one hundred eighty-nine".