63489789 has 36 divisors (see below), whose sum is σ = 101685948. Its totient is φ = 38142720.

The previous prime is 63489757. The next prime is 63489791. The reversal of 63489789 is 98798436.

It can be written as a sum of positive squares in 2 ways, for example, as 39312900 + 24176889 = 6270^2 + 4917^2 .

It is not a de Polignac number, because 63489789 - 2⁵ = 63489757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63489709) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188229 + ... + 188565.

Almost surely, 2^63489789 is an apocalyptic number.

It is an amenable number.

63489789 is a deficient number, since it is larger than the sum of its proper divisors (38196159).

63489789 is a wasteful number, since it uses less digits than its factorization.

63489789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 524 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 63489789 is about 7968.0480043735. The cubic root of 63489789 is about 398.9342232385.

The spelling of 63489789 in words is "sixty-three million, four hundred eighty-nine thousand, seven hundred eighty-nine".