81000467 has 2 divisors, whose sum is σ = 81000468. Its totient is φ = 81000466.

The previous prime is 81000463. The next prime is 81000481. The reversal of 81000467 is 76400018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81000467 - 2² = 81000463 is a prime.

It is a super-2 number, since 2×81000467² = 13122151308436178, which contains 22 as substring.

It is a Chen prime.

It is equal to p_4724441 and since 81000467 and 4724441 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (81000463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40500233 + 40500234.

It is an arithmetic number, because the mean of its divisors is an integer number (40500234).

Almost surely, 2^81000467 is an apocalyptic number.

81000467 is a deficient number, since it is larger than the sum of its proper divisors (1).

81000467 is an equidigital number, since it uses as much as digits as its factorization.

81000467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 81000467 is about 9000.0259444070. The cubic root of 81000467 is about 432.6757026098.

The spelling of 81000467 in words is "eighty-one million, four hundred sixty-seven", and thus it is an aban number.