63461987 has 4 divisors (see below), whose sum is σ = 63642120. Its totient is φ = 63281856.

The previous prime is 63461971. The next prime is 63461989. The reversal of 63461987 is 78916436.

63461987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 63461987 - 2⁴ = 63461971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63461989) 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 in 3 ways as a sum of consecutive naturals, for example, 89537 + ... + 90242.

It is an arithmetic number, because the mean of its divisors is an integer number (15910530).

Almost surely, 2^63461987 is an apocalyptic number.

63461987 is a deficient number, since it is larger than the sum of its proper divisors (180133).

63461987 is a wasteful number, since it uses less digits than its factorization.

63461987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180132.

The product of its digits is 217728, while the sum is 44.

The square root of 63461987 is about 7966.3032204405. The cubic root of 63461987 is about 398.8759840120.

The spelling of 63461987 in words is "sixty-three million, four hundred sixty-one thousand, nine hundred eighty-seven".