81608083 has 2 divisors, whose sum is σ = 81608084. Its totient is φ = 81608082.

The previous prime is 81608053. The next prime is 81608113. The reversal of 81608083 is 38080618.

It is a balanced prime because it is at equal distance from previous prime (81608053) and next prime (81608113).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81608083 is a prime.

It is not a weakly prime, because it can be changed into another prime (81608003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40804041 + 40804042.

It is an arithmetic number, because the mean of its divisors is an integer number (40804042).

Almost surely, 2^81608083 is an apocalyptic number.

81608083 is a deficient number, since it is larger than the sum of its proper divisors (1).

81608083 is an equidigital number, since it uses as much as digits as its factorization.

81608083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 81608083 is about 9033.7192230000. The cubic root of 81608083 is about 433.7548981666.

The spelling of 81608083 in words is "eighty-one million, six hundred eight thousand, eighty-three".