63678137 has 2 divisors, whose sum is σ = 63678138. Its totient is φ = 63678136.

The previous prime is 63678103. The next prime is 63678143. The reversal of 63678137 is 73187636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38887696 + 24790441 = 6236^2 + 4979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63678137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63678094 and 63678103.

It is not a weakly prime, because it can be changed into another prime (63678157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31839068 + 31839069.

It is an arithmetic number, because the mean of its divisors is an integer number (31839069).

Almost surely, 2^63678137 is an apocalyptic number.

It is an amenable number.

63678137 is a deficient number, since it is larger than the sum of its proper divisors (1).

63678137 is an equidigital number, since it uses as much as digits as its factorization.

63678137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 63678137 is about 7979.8582067603. The cubic root of 63678137 is about 399.3283248459.

The spelling of 63678137 in words is "sixty-three million, six hundred seventy-eight thousand, one hundred thirty-seven".