63890261 has 2 divisors, whose sum is σ = 63890262. Its totient is φ = 63890260.

The previous prime is 63890213. The next prime is 63890317. The reversal of 63890261 is 16209836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62315236 + 1575025 = 7894^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 63890261 - 2¹⁰ = 63889237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63890461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31945130 + 31945131.

It is an arithmetic number, because the mean of its divisors is an integer number (31945131).

Almost surely, 2^63890261 is an apocalyptic number.

It is an amenable number.

63890261 is a deficient number, since it is larger than the sum of its proper divisors (1).

63890261 is an equidigital number, since it uses as much as digits as its factorization.

63890261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 63890261 is about 7993.1383698770. The cubic root of 63890261 is about 399.7712462876.

The spelling of 63890261 in words is "sixty-three million, eight hundred ninety thousand, two hundred sixty-one".