63431983 has 4 divisors (see below), whose sum is σ = 65478208. Its totient is φ = 61385760.

The previous prime is 63431971. The next prime is 63431987. The reversal of 63431983 is 38913436.

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 63431983 - 2¹³ = 63423791 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 (63431987) 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, 1023066 + ... + 1023127.

It is an arithmetic number, because the mean of its divisors is an integer number (16369552).

Almost surely, 2^63431983 is an apocalyptic number.

63431983 is a deficient number, since it is larger than the sum of its proper divisors (2046225).

63431983 is a wasteful number, since it uses less digits than its factorization.

63431983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046224.

The product of its digits is 46656, while the sum is 37.

The square root of 63431983 is about 7964.4198156551. The cubic root of 63431983 is about 398.8131129813.

The spelling of 63431983 in words is "sixty-three million, four hundred thirty-one thousand, nine hundred eighty-three".