81498167 has 2 divisors, whose sum is σ = 81498168. Its totient is φ = 81498166.

The previous prime is 81498133. The next prime is 81498211. The reversal of 81498167 is 76189418.

It is an a-pointer prime, because the next prime (81498211) can be obtained adding 81498167 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81498167 - 2¹⁴ = 81481783 is a prime.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81498107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40749083 + 40749084.

It is an arithmetic number, because the mean of its divisors is an integer number (40749084).

Almost surely, 2^81498167 is an apocalyptic number.

81498167 is a deficient number, since it is larger than the sum of its proper divisors (1).

81498167 is an equidigital number, since it uses as much as digits as its factorization.

81498167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 81498167 is about 9027.6335215825. The cubic root of 81498167 is about 433.5600725950.

The spelling of 81498167 in words is "eighty-one million, four hundred ninety-eight thousand, one hundred sixty-seven".