63890609 has 2 divisors, whose sum is σ = 63890610. Its totient is φ = 63890608.

The previous prime is 63890581. The next prime is 63890623. The reversal of 63890609 is 90609836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32809984 + 31080625 = 5728^2 + 5575^2 .

It is a cyclic number.

It is not a de Polignac number, because 63890609 - 2¹² = 63886513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63830609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31945304 + 31945305.

It is an arithmetic number, because the mean of its divisors is an integer number (31945305).

Almost surely, 2^63890609 is an apocalyptic number.

It is an amenable number.

63890609 is a deficient number, since it is larger than the sum of its proper divisors (1).

63890609 is an equidigital number, since it uses as much as digits as its factorization.

63890609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 63890609 is about 7993.1601385184. The cubic root of 63890609 is about 399.7719721162.

The spelling of 63890609 in words is "sixty-three million, eight hundred ninety thousand, six hundred nine".