63513983 has 4 divisors (see below), whose sum is σ = 68399688. Its totient is φ = 58628280.

The previous prime is 63513977. The next prime is 63514001. The reversal of 63513983 is 38931536.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63513983 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 (63513943) 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, 2442833 + ... + 2442858.

It is an arithmetic number, because the mean of its divisors is an integer number (17099922).

Almost surely, 2^63513983 is an apocalyptic number.

63513983 is a deficient number, since it is larger than the sum of its proper divisors (4885705).

63513983 is a wasteful number, since it uses less digits than its factorization.

63513983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885704.

The product of its digits is 58320, while the sum is 38.

The square root of 63513983 is about 7969.5660484119. The cubic root of 63513983 is about 398.9848906450.

The spelling of 63513983 in words is "sixty-three million, five hundred thirteen thousand, nine hundred eighty-three".