63977811 has 8 divisors (see below), whose sum is σ = 86331840. Its totient is φ = 42137832.

The previous prime is 63977801. The next prime is 63977819. The reversal of 63977811 is 11877936.

63977811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 63977811 - 2⁵ = 63977779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63977819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 128221 + ... + 128718.

It is an arithmetic number, because the mean of its divisors is an integer number (10791480).

Almost surely, 2^63977811 is an apocalyptic number.

63977811 is a deficient number, since it is larger than the sum of its proper divisors (22354029).

63977811 is a wasteful number, since it uses less digits than its factorization.

63977811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257025.

The product of its digits is 63504, while the sum is 42.

The square root of 63977811 is about 7998.6130672761. The cubic root of 63977811 is about 399.9537675733.

The spelling of 63977811 in words is "sixty-three million, nine hundred seventy-seven thousand, eight hundred eleven".