63609983 has 4 divisors (see below), whose sum is σ = 65161488. Its totient is φ = 62058480.

The previous prime is 63609979. The next prime is 63609989. The reversal of 63609983 is 38990636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63609983 - 2² = 63609979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63609989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775691 + ... + 775772.

It is an arithmetic number, because the mean of its divisors is an integer number (16290372).

Almost surely, 2^63609983 is an apocalyptic number.

63609983 is a deficient number, since it is larger than the sum of its proper divisors (1551505).

63609983 is a wasteful number, since it uses less digits than its factorization.

63609983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551504.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 63609983 is about 7975.5866868839. The cubic root of 63609983 is about 399.1858084380.

The spelling of 63609983 in words is "sixty-three million, six hundred nine thousand, nine hundred eighty-three".