63840677 has 2 divisors, whose sum is σ = 63840678. Its totient is φ = 63840676.

The previous prime is 63840547. The next prime is 63840683. The reversal of 63840677 is 77604836.

63840677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33744481 + 30096196 = 5809^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 63840677 - 2¹⁰ = 63839653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63840877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31920338 + 31920339.

It is an arithmetic number, because the mean of its divisors is an integer number (31920339).

Almost surely, 2^63840677 is an apocalyptic number.

It is an amenable number.

63840677 is a deficient number, since it is larger than the sum of its proper divisors (1).

63840677 is an equidigital number, since it uses as much as digits as its factorization.

63840677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 63840677 is about 7990.0361075530. The cubic root of 63840677 is about 399.6678012697.

The spelling of 63840677 in words is "sixty-three million, eight hundred forty thousand, six hundred seventy-seven".