63547989 has 16 divisors (see below), whose sum is σ = 94438080. Its totient is φ = 37774080.

The previous prime is 63547987. The next prime is 63547997. The reversal of 63547989 is 98974536.

It is not a de Polignac number, because 63547989 - 2¹ = 63547987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63547987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31822 + ... + 33759.

It is an arithmetic number, because the mean of its divisors is an integer number (5902380).

Almost surely, 2^63547989 is an apocalyptic number.

It is an amenable number.

63547989 is a deficient number, since it is larger than the sum of its proper divisors (30890091).

63547989 is a wasteful number, since it uses less digits than its factorization.

63547989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65620.

The product of its digits is 1632960, while the sum is 51.

The square root of 63547989 is about 7971.6992542368. The cubic root of 63547989 is about 399.0560847287.

The spelling of 63547989 in words is "sixty-three million, five hundred forty-seven thousand, nine hundred eighty-nine".