81344467 has 2 divisors, whose sum is σ = 81344468. Its totient is φ = 81344466.

The previous prime is 81344447. The next prime is 81344479. The reversal of 81344467 is 76444318.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81344467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81344407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40672233 + 40672234.

It is an arithmetic number, because the mean of its divisors is an integer number (40672234).

Almost surely, 2^81344467 is an apocalyptic number.

81344467 is a deficient number, since it is larger than the sum of its proper divisors (1).

81344467 is an equidigital number, since it uses as much as digits as its factorization.

81344467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The square root of 81344467 is about 9019.1167527647. The cubic root of 81344467 is about 433.2873461389.

The spelling of 81344467 in words is "eighty-one million, three hundred forty-four thousand, four hundred sixty-seven".