81833347 has 2 divisors, whose sum is σ = 81833348. Its totient is φ = 81833346.

The previous prime is 81833341. The next prime is 81833363. The reversal of 81833347 is 74333818.

It is a weak prime.

81833347 is a truncatable prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81833347 is a prime.

It is not a weakly prime, because it can be changed into another prime (81833341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40916673 + 40916674.

It is an arithmetic number, because the mean of its divisors is an integer number (40916674).

Almost surely, 2^81833347 is an apocalyptic number.

81833347 is a deficient number, since it is larger than the sum of its proper divisors (1).

81833347 is an equidigital number, since it uses as much as digits as its factorization.

81833347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 81833347 is about 9046.1785854581. The cubic root of 81833347 is about 434.1536315377.

The spelling of 81833347 in words is "eighty-one million, eight hundred thirty-three thousand, three hundred forty-seven".