81734353 has 2 divisors, whose sum is σ = 81734354. Its totient is φ = 81734352.

The previous prime is 81734347. The next prime is 81734399. The reversal of 81734353 is 35343718.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79067664 + 2666689 = 8892^2 + 1633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81734353 is a prime.

It is not a weakly prime, because it can be changed into another prime (81734053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40867176 + 40867177.

It is an arithmetic number, because the mean of its divisors is an integer number (40867177).

Almost surely, 2^81734353 is an apocalyptic number.

It is an amenable number.

81734353 is a deficient number, since it is larger than the sum of its proper divisors (1).

81734353 is an equidigital number, since it uses as much as digits as its factorization.

81734353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 81734353 is about 9040.7053375276. The cubic root of 81734353 is about 433.9784953278.

The spelling of 81734353 in words is "eighty-one million, seven hundred thirty-four thousand, three hundred fifty-three".