63681247 has 8 divisors (see below), whose sum is σ = 72827936. Its totient is φ = 54546912.

The previous prime is 63681239. The next prime is 63681251. The reversal of 63681247 is 74218636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63681247 - 2³ = 63681239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63681257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15193 + ... + 18925.

It is an arithmetic number, because the mean of its divisors is an integer number (9103492).

Almost surely, 2^63681247 is an apocalyptic number.

63681247 is a deficient number, since it is larger than the sum of its proper divisors (9146689).

63681247 is a wasteful number, since it uses less digits than its factorization.

63681247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6177.

The product of its digits is 48384, while the sum is 37.

The square root of 63681247 is about 7980.0530699990. The cubic root of 63681247 is about 399.3348257211.

The spelling of 63681247 in words is "sixty-three million, six hundred eighty-one thousand, two hundred forty-seven".