63998135 has 4 divisors (see below), whose sum is σ = 76797768. Its totient is φ = 51198504.

The previous prime is 63998119. The next prime is 63998153. The reversal of 63998135 is 53189936.

63998135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63998135 - 2⁴ = 63998119 is a prime.

It is a super-2 number, since 2×63998135² = 8191522566956450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6399809 + ... + 6399818.

It is an arithmetic number, because the mean of its divisors is an integer number (19199442).

Almost surely, 2^63998135 is an apocalyptic number.

63998135 is a deficient number, since it is larger than the sum of its proper divisors (12799633).

63998135 is a wasteful number, since it uses less digits than its factorization.

63998135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12799632.

The product of its digits is 174960, while the sum is 44.

The square root of 63998135 is about 7999.8834366508. The cubic root of 63998135 is about 399.9961145456.

It can be divided in two parts, 63 and 998135, that multiplied together give a triangular number (62882505 = T₁₁₂₁₄).

The spelling of 63998135 in words is "sixty-three million, nine hundred ninety-eight thousand, one hundred thirty-five".