63256861 has 2 divisors, whose sum is σ = 63256862. Its totient is φ = 63256860.

The previous prime is 63256841. The next prime is 63256883. The reversal of 63256861 is 16865236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57851236 + 5405625 = 7606^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 63256861 - 2¹¹ = 63254813 is a prime.

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 63256861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63256841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31628430 + 31628431.

It is an arithmetic number, because the mean of its divisors is an integer number (31628431).

Almost surely, 2^63256861 is an apocalyptic number.

It is an amenable number.

63256861 is a deficient number, since it is larger than the sum of its proper divisors (1).

63256861 is an equidigital number, since it uses as much as digits as its factorization.

63256861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 63256861 is about 7953.4181959708. The cubic root of 63256861 is about 398.4457624359.

The spelling of 63256861 in words is "sixty-three million, two hundred fifty-six thousand, eight hundred sixty-one".