63667489 has 4 divisors (see below), whose sum is σ = 64089280. Its totient is φ = 63245700.

The previous prime is 63667481. The next prime is 63667501. The reversal of 63667489 is 98476636.

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 63667489 - 2³ = 63667481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63667481) 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, 210669 + ... + 210970.

It is an arithmetic number, because the mean of its divisors is an integer number (16022320).

Almost surely, 2^63667489 is an apocalyptic number.

It is an amenable number.

63667489 is a deficient number, since it is larger than the sum of its proper divisors (421791).

63667489 is a wasteful number, since it uses less digits than its factorization.

63667489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421790.

The product of its digits is 1306368, while the sum is 49.

The square root of 63667489 is about 7979.1909990926. The cubic root of 63667489 is about 399.3060655837.

The spelling of 63667489 in words is "sixty-three million, six hundred sixty-seven thousand, four hundred eighty-nine".