63438409 has 2 divisors, whose sum is σ = 63438410. Its totient is φ = 63438408.

The previous prime is 63438337. The next prime is 63438433. The reversal of 63438409 is 90483436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62853184 + 585225 = 7928^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 63438409 - 2²¹ = 61341257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63438469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31719204 + 31719205.

It is an arithmetic number, because the mean of its divisors is an integer number (31719205).

Almost surely, 2^63438409 is an apocalyptic number.

It is an amenable number.

63438409 is a deficient number, since it is larger than the sum of its proper divisors (1).

63438409 is an equidigital number, since it uses as much as digits as its factorization.

63438409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 63438409 is about 7964.8232246548. The cubic root of 63438409 is about 398.8265798288.

The spelling of 63438409 in words is "sixty-three million, four hundred thirty-eight thousand, four hundred nine".