81083833 has 2 divisors, whose sum is σ = 81083834. Its totient is φ = 81083832.

The previous prime is 81083813. The next prime is 81083881. The reversal of 81083833 is 33838018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64208169 + 16875664 = 8013^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 81083833 - 2²¹ = 78986681 is a prime.

It is not a weakly prime, because it can be changed into another prime (81083803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40541916 + 40541917.

It is an arithmetic number, because the mean of its divisors is an integer number (40541917).

Almost surely, 2^81083833 is an apocalyptic number.

It is an amenable number.

81083833 is a deficient number, since it is larger than the sum of its proper divisors (1).

81083833 is an equidigital number, since it uses as much as digits as its factorization.

81083833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 81083833 is about 9004.6561844415. The cubic root of 81083833 is about 432.8240888946.

The spelling of 81083833 in words is "eighty-one million, eighty-three thousand, eight hundred thirty-three".