63158861 has 2 divisors, whose sum is σ = 63158862. Its totient is φ = 63158860.

The previous prime is 63158833. The next prime is 63158863. The reversal of 63158861 is 16885136.

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., 31866025 + 31292836 = 5645^2 + 5594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63158861 is a prime.

Together with 63158863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63158863) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31579430 + 31579431.

It is an arithmetic number, because the mean of its divisors is an integer number (31579431).

Almost surely, 2^63158861 is an apocalyptic number.

It is an amenable number.

63158861 is a deficient number, since it is larger than the sum of its proper divisors (1).

63158861 is an equidigital number, since it uses as much as digits as its factorization.

63158861 is an odious number, because the sum of its binary digits is odd.

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

The square root of 63158861 is about 7947.2549348816. The cubic root of 63158861 is about 398.2398935061.

The spelling of 63158861 in words is "sixty-three million, one hundred fifty-eight thousand, eight hundred sixty-one".