63936137 has 4 divisors (see below), whose sum is σ = 64017156. Its totient is φ = 63855120.

The previous prime is 63936109. The next prime is 63936143. The reversal of 63936137 is 73163936.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31091776 + 32844361 = 5576^2 + 5731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63936137 is a prime.

It is a super-2 number, since 2×63936137² = 8175659228965538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63936137.

It is not an unprimeable number, because it can be changed into a prime (63936437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39314 + ... + 40907.

It is an arithmetic number, because the mean of its divisors is an integer number (16004289).

Almost surely, 2^63936137 is an apocalyptic number.

It is an amenable number.

63936137 is a deficient number, since it is larger than the sum of its proper divisors (81019).

63936137 is an equidigital number, since it uses as much as digits as its factorization.

63936137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81018.

The product of its digits is 61236, while the sum is 38.

The square root of 63936137 is about 7996.0075662796. The cubic root of 63936137 is about 399.8669078044.

The spelling of 63936137 in words is "sixty-three million, nine hundred thirty-six thousand, one hundred thirty-seven".