81134167 has 2 divisors, whose sum is σ = 81134168. Its totient is φ = 81134166.

The previous prime is 81134159. The next prime is 81134177. The reversal of 81134167 is 76143118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81134167 - 2³ = 81134159 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 (81134147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40567083 + 40567084.

It is an arithmetic number, because the mean of its divisors is an integer number (40567084).

Almost surely, 2^81134167 is an apocalyptic number.

81134167 is a deficient number, since it is larger than the sum of its proper divisors (1).

81134167 is an equidigital number, since it uses as much as digits as its factorization.

81134167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 81134167 is about 9007.4506382217. The cubic root of 81134167 is about 432.9136310408.

The spelling of 81134167 in words is "eighty-one million, one hundred thirty-four thousand, one hundred sixty-seven".