63378671 has 4 divisors (see below), whose sum is σ = 63758352. Its totient is φ = 62998992.

The previous prime is 63378641. The next prime is 63378677. The reversal of 63378671 is 17687336.

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 63378671 - 2¹⁰ = 63377647 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 (63378677) 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, 189590 + ... + 189923.

It is an arithmetic number, because the mean of its divisors is an integer number (15939588).

Almost surely, 2^63378671 is an apocalyptic number.

63378671 is a deficient number, since it is larger than the sum of its proper divisors (379681).

63378671 is a wasteful number, since it uses less digits than its factorization.

63378671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379680.

The product of its digits is 127008, while the sum is 41.

The square root of 63378671 is about 7961.0722267795. The cubic root of 63378671 is about 398.7013529356.

The spelling of 63378671 in words is "sixty-three million, three hundred seventy-eight thousand, six hundred seventy-one".