81345067 has 2 divisors, whose sum is σ = 81345068. Its totient is φ = 81345066.

The previous prime is 81345049. The next prime is 81345113. The reversal of 81345067 is 76054318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81345067 - 2¹⁵ = 81312299 is a prime.

It is not a weakly prime, because it can be changed into another prime (81345037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40672533 + 40672534.

It is an arithmetic number, because the mean of its divisors is an integer number (40672534).

Almost surely, 2^81345067 is an apocalyptic number.

81345067 is a deficient number, since it is larger than the sum of its proper divisors (1).

81345067 is an equidigital number, since it uses as much as digits as its factorization.

81345067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 81345067 is about 9019.1500153839. The cubic root of 81345067 is about 433.2884114511.

The spelling of 81345067 in words is "eighty-one million, three hundred forty-five thousand, sixty-seven".