81794441 has 2 divisors, whose sum is σ = 81794442. Its totient is φ = 81794440.

The previous prime is 81794437. The next prime is 81794459. The reversal of 81794441 is 14449718.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81631225 + 163216 = 9035^2 + 404^2 .

It is a cyclic number.

It is not a de Polignac number, because 81794441 - 2² = 81794437 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 81794395 and 81794404.

It is not a weakly prime, because it can be changed into another prime (81794431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40897220 + 40897221.

It is an arithmetic number, because the mean of its divisors is an integer number (40897221).

Almost surely, 2^81794441 is an apocalyptic number.

It is an amenable number.

81794441 is a deficient number, since it is larger than the sum of its proper divisors (1).

81794441 is an equidigital number, since it uses as much as digits as its factorization.

81794441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 81794441 is about 9044.0279190193. The cubic root of 81794441 is about 434.0848174606.

The spelling of 81794441 in words is "eighty-one million, seven hundred ninety-four thousand, four hundred forty-one".