63278461 has 2 divisors, whose sum is σ = 63278462. Its totient is φ = 63278460.

The previous prime is 63278459. The next prime is 63278483. The reversal of 63278461 is 16487236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55041561 + 8236900 = 7419^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 63278461 - 2¹ = 63278459 is a prime.

Together with 63278459, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63278461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63278441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31639230 + 31639231.

It is an arithmetic number, because the mean of its divisors is an integer number (31639231).

Almost surely, 2^63278461 is an apocalyptic number.

It is an amenable number.

63278461 is a deficient number, since it is larger than the sum of its proper divisors (1).

63278461 is an equidigital number, since it uses as much as digits as its factorization.

63278461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 63278461 is about 7954.7759867893. The cubic root of 63278461 is about 398.4911090271.

The spelling of 63278461 in words is "sixty-three million, two hundred seventy-eight thousand, four hundred sixty-one".