63680137 has 2 divisors, whose sum is σ = 63680138. Its totient is φ = 63680136.

The previous prime is 63680129. The next prime is 63680161. The reversal of 63680137 is 73108636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43349056 + 20331081 = 6584^2 + 4509^2 .

It is a cyclic number.

It is not a de Polignac number, because 63680137 - 2³ = 63680129 is a prime.

It is not a weakly prime, because it can be changed into another prime (63680117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31840068 + 31840069.

It is an arithmetic number, because the mean of its divisors is an integer number (31840069).

Almost surely, 2^63680137 is an apocalyptic number.

It is an amenable number.

63680137 is a deficient number, since it is larger than the sum of its proper divisors (1).

63680137 is an equidigital number, since it uses as much as digits as its factorization.

63680137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 63680137 is about 7979.9835212862. The cubic root of 63680137 is about 399.3325054973.

The spelling of 63680137 in words is "sixty-three million, six hundred eighty thousand, one hundred thirty-seven".