81038467 has 2 divisors, whose sum is σ = 81038468. Its totient is φ = 81038466.

The previous prime is 81038459. The next prime is 81038471. The reversal of 81038467 is 76483018.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81038467 - 2³ = 81038459 is a prime.

It is not a weakly prime, because it can be changed into another prime (81038417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40519233 + 40519234.

It is an arithmetic number, because the mean of its divisors is an integer number (40519234).

Almost surely, 2^81038467 is an apocalyptic number.

81038467 is a deficient number, since it is larger than the sum of its proper divisors (1).

81038467 is an equidigital number, since it uses as much as digits as its factorization.

81038467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 81038467 is about 9002.1368018932. The cubic root of 81038467 is about 432.7433528628.

The spelling of 81038467 in words is "eighty-one million, thirty-eight thousand, four hundred sixty-seven".