81167063 has 2 divisors, whose sum is σ = 81167064. Its totient is φ = 81167062.

The previous prime is 81167059. The next prime is 81167081. The reversal of 81167063 is 36076118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81167063 - 2² = 81167059 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81167263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40583531 + 40583532.

It is an arithmetic number, because the mean of its divisors is an integer number (40583532).

Almost surely, 2^81167063 is an apocalyptic number.

81167063 is a deficient number, since it is larger than the sum of its proper divisors (1).

81167063 is an equidigital number, since it uses as much as digits as its factorization.

81167063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 81167063 is about 9009.2764970335. The cubic root of 81167063 is about 432.9721316827.

The spelling of 81167063 in words is "eighty-one million, one hundred sixty-seven thousand, sixty-three".