63998542 has 4 divisors (see below), whose sum is σ = 95997816. Its totient is φ = 31999270.

The previous prime is 63998533. The next prime is 63998569. The reversal of 63998542 is 24589936.

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

It is a junction number, because it is equal to n+sod(n) for n = 63998492 and 63998501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15999634 + ... + 15999637.

It is an arithmetic number, because the mean of its divisors is an integer number (23999454).

Almost surely, 2^63998542 is an apocalyptic number.

63998542 is a deficient number, since it is larger than the sum of its proper divisors (31999274).

63998542 is a wasteful number, since it uses less digits than its factorization.

63998542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31999273.

The product of its digits is 466560, while the sum is 46.

The square root of 63998542 is about 7999.9088744810. The cubic root of 63998542 is about 399.9969624769.

It can be divided in two parts, 6399 and 8542, that added together give a palindrome (14941).

The spelling of 63998542 in words is "sixty-three million, nine hundred ninety-eight thousand, five hundred forty-two".