63858161 has 2 divisors, whose sum is σ = 63858162. Its totient is φ = 63858160.

The previous prime is 63858133. The next prime is 63858173. The reversal of 63858161 is 16185836.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32273761 + 31584400 = 5681^2 + 5620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63858161 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (63858121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31929080 + 31929081.

It is an arithmetic number, because the mean of its divisors is an integer number (31929081).

Almost surely, 2^63858161 is an apocalyptic number.

It is an amenable number.

63858161 is a deficient number, since it is larger than the sum of its proper divisors (1).

63858161 is an equidigital number, since it uses as much as digits as its factorization.

63858161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 63858161 is about 7991.1301453549. The cubic root of 63858161 is about 399.7042835166.

The spelling of 63858161 in words is "sixty-three million, eight hundred fifty-eight thousand, one hundred sixty-one".