63878077 has 2 divisors, whose sum is σ = 63878078. Its totient is φ = 63878076.

The previous prime is 63878071. The next prime is 63878083. The reversal of 63878077 is 77087836.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (63878071) and next prime (63878083).

It can be written as a sum of positive squares in only one way, i.e., 59505796 + 4372281 = 7714^2 + 2091^2 .

It is a cyclic number.

It is not a de Polignac number, because 63878077 - 2³ = 63878069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63878071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31939038 + 31939039.

It is an arithmetic number, because the mean of its divisors is an integer number (31939039).

Almost surely, 2^63878077 is an apocalyptic number.

It is an amenable number.

63878077 is a deficient number, since it is larger than the sum of its proper divisors (1).

63878077 is an equidigital number, since it uses as much as digits as its factorization.

63878077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 63878077 is about 7992.3761798354. The cubic root of 63878077 is about 399.7458322811.

The spelling of 63878077 in words is "sixty-three million, eight hundred seventy-eight thousand, seventy-seven".