63998427 has 8 divisors (see below), whose sum is σ = 85420816. Its totient is φ = 42620832.

The previous prime is 63998423. The next prime is 63998437. The reversal of 63998427 is 72489936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63998427 - 2² = 63998423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63998423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7708 + ... + 13689.

It is an arithmetic number, because the mean of its divisors is an integer number (10677602).

Almost surely, 2^63998427 is an apocalyptic number.

63998427 is a deficient number, since it is larger than the sum of its proper divisors (21422389).

63998427 is a wasteful number, since it uses less digits than its factorization.

63998427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22397.

The product of its digits is 653184, while the sum is 48.

The square root of 63998427 is about 7999.9016868959. The cubic root of 63998427 is about 399.9967228898.

The spelling of 63998427 in words is "sixty-three million, nine hundred ninety-eight thousand, four hundred twenty-seven".