63728089 has 4 divisors (see below), whose sum is σ = 63963520. Its totient is φ = 63492660.

The previous prime is 63728081. The next prime is 63728113. The reversal of 63728089 is 98082736.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63728089 - 2³ = 63728081 is a prime.

It is a super-2 number, since 2×63728089² = 8122538655183842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63728081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117309 + ... + 117850.

It is an arithmetic number, because the mean of its divisors is an integer number (15990880).

Almost surely, 2^63728089 is an apocalyptic number.

It is an amenable number.

63728089 is a deficient number, since it is larger than the sum of its proper divisors (235431).

63728089 is a wasteful number, since it uses less digits than its factorization.

63728089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235430.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 63728089 is about 7982.9874733711. The cubic root of 63728089 is about 399.4327145985.

The spelling of 63728089 in words is "sixty-three million, seven hundred twenty-eight thousand, eighty-nine".