63306689 has 4 divisors (see below), whose sum is σ = 66638640. Its totient is φ = 59974740.

The previous prime is 63306647. The next prime is 63306701. The reversal of 63306689 is 98660336.

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 63306689 - 2¹² = 63302593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63306629) 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, 1665947 + ... + 1665984.

It is an arithmetic number, because the mean of its divisors is an integer number (16659660).

Almost surely, 2^63306689 is an apocalyptic number.

It is an amenable number.

63306689 is a deficient number, since it is larger than the sum of its proper divisors (3331951).

63306689 is a wasteful number, since it uses less digits than its factorization.

63306689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331950.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 63306689 is about 7956.5500689683. The cubic root of 63306689 is about 398.5503547516.

The spelling of 63306689 in words is "sixty-three million, three hundred six thousand, six hundred eighty-nine".