81927353 has 2 divisors, whose sum is σ = 81927354. Its totient is φ = 81927352.

The previous prime is 81927337. The next prime is 81927359. The reversal of 81927353 is 35372918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44129449 + 37797904 = 6643^2 + 6148^2 .

It is a cyclic number.

It is not a de Polignac number, because 81927353 - 2⁴ = 81927337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (81927359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40963676 + 40963677.

It is an arithmetic number, because the mean of its divisors is an integer number (40963677).

Almost surely, 2^81927353 is an apocalyptic number.

It is an amenable number.

81927353 is a deficient number, since it is larger than the sum of its proper divisors (1).

81927353 is an equidigital number, since it uses as much as digits as its factorization.

81927353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 81927353 is about 9051.3729897734. The cubic root of 81927353 is about 434.3198124804.

The spelling of 81927353 in words is "eighty-one million, nine hundred twenty-seven thousand, three hundred fifty-three".