63489821 has 8 divisors (see below), whose sum is σ = 66330240. Its totient is φ = 60656112.

The previous prime is 63489799. The next prime is 63489823. The reversal of 63489821 is 12898436.

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 63489821 - 2⁶ = 63489757 is a prime.

It is a super-2 number, since 2×63489821² = 8061914741224082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63489823) 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, 34595 + ... + 36383.

It is an arithmetic number, because the mean of its divisors is an integer number (8291280).

Almost surely, 2^63489821 is an apocalyptic number.

It is an amenable number.

63489821 is a deficient number, since it is larger than the sum of its proper divisors (2840419).

63489821 is a wasteful number, since it uses less digits than its factorization.

63489821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355.

The product of its digits is 82944, while the sum is 41.

The square root of 63489821 is about 7968.0500123932. The cubic root of 63489821 is about 398.9342902618.

The spelling of 63489821 in words is "sixty-three million, four hundred eighty-nine thousand, eight hundred twenty-one".