81935311 has 2 divisors, whose sum is σ = 81935312. Its totient is φ = 81935310.

The previous prime is 81935299. The next prime is 81935323. The reversal of 81935311 is 11353918.

It is a balanced prime because it is at equal distance from previous prime (81935299) and next prime (81935323).

It is a cyclic number.

It is not a de Polignac number, because 81935311 - 2¹³ = 81927119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81935351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40967655 + 40967656.

It is an arithmetic number, because the mean of its divisors is an integer number (40967656).

Almost surely, 2^81935311 is an apocalyptic number.

81935311 is a deficient number, since it is larger than the sum of its proper divisors (1).

81935311 is an equidigital number, since it uses as much as digits as its factorization.

81935311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 81935311 is about 9051.8125809144. The cubic root of 81935311 is about 434.3338745531. Note that the first 3 decimals are identical.

The spelling of 81935311 in words is "eighty-one million, nine hundred thirty-five thousand, three hundred eleven".