63278869 has 2 divisors, whose sum is σ = 63278870. Its totient is φ = 63278868.

The previous prime is 63278863. The next prime is 63278923. The reversal of 63278869 is 96887236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 1656369 = 7850^2 + 1287^2 .

It is a cyclic number.

It is not a de Polignac number, because 63278869 - 2³ = 63278861 is a prime.

It is a super-2 number, since 2×63278869² = 8008430523838322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63278861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31639434 + 31639435.

It is an arithmetic number, because the mean of its divisors is an integer number (31639435).

Almost surely, 2^63278869 is an apocalyptic number.

It is an amenable number.

63278869 is a deficient number, since it is larger than the sum of its proper divisors (1).

63278869 is an equidigital number, since it uses as much as digits as its factorization.

63278869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 63278869 is about 7954.8016317190. The cubic root of 63278869 is about 398.4919654745.

The spelling of 63278869 in words is "sixty-three million, two hundred seventy-eight thousand, eight hundred sixty-nine".