81354353 has 2 divisors, whose sum is σ = 81354354. Its totient is φ = 81354352.

The previous prime is 81354331. The next prime is 81354397. The reversal of 81354353 is 35345318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62283664 + 19070689 = 7892^2 + 4367^2 .

It is a cyclic number.

It is not a de Polignac number, because 81354353 - 2¹² = 81350257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81354953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40677176 + 40677177.

It is an arithmetic number, because the mean of its divisors is an integer number (40677177).

Almost surely, 2^81354353 is an apocalyptic number.

It is an amenable number.

81354353 is a deficient number, since it is larger than the sum of its proper divisors (1).

81354353 is an equidigital number, since it uses as much as digits as its factorization.

81354353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

The square root of 81354353 is about 9019.6647942149. The cubic root of 81354353 is about 433.3048982656.

The spelling of 81354353 in words is "eighty-one million, three hundred fifty-four thousand, three hundred fifty-three".