63679621 has 8 divisors (see below), whose sum is σ = 69343200. Its totient is φ = 58247280.

The previous prime is 63679619. The next prime is 63679667. The reversal of 63679621 is 12697636.

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

It is a cyclic number.

It is not a de Polignac number, because 63679621 - 2¹ = 63679619 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 (63679691) 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, 57235 + ... + 58336.

It is an arithmetic number, because the mean of its divisors is an integer number (8667900).

Almost surely, 2^63679621 is an apocalyptic number.

It is an amenable number.

63679621 is a deficient number, since it is larger than the sum of its proper divisors (5663579).

63679621 is a wasteful number, since it uses less digits than its factorization.

63679621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115619.

The product of its digits is 81648, while the sum is 40.

The square root of 63679621 is about 7979.9511903269. The cubic root of 63679621 is about 399.3314268976.

The spelling of 63679621 in words is "sixty-three million, six hundred seventy-nine thousand, six hundred twenty-one".