81343307 has 2 divisors, whose sum is σ = 81343308. Its totient is φ = 81343306.

The previous prime is 81343277. The next prime is 81343309. The reversal of 81343307 is 70334318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81343307 - 2⁸ = 81343051 is a prime.

Together with 81343309, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81343307.

It is not a weakly prime, because it can be changed into another prime (81343309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40671653 + 40671654.

It is an arithmetic number, because the mean of its divisors is an integer number (40671654).

Almost surely, 2^81343307 is an apocalyptic number.

81343307 is a deficient number, since it is larger than the sum of its proper divisors (1).

81343307 is an equidigital number, since it uses as much as digits as its factorization.

81343307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 81343307 is about 9019.0524446862. The cubic root of 81343307 is about 433.2852865204.

The spelling of 81343307 in words is "eighty-one million, three hundred forty-three thousand, three hundred seven".