81141727 has 2 divisors, whose sum is σ = 81141728. Its totient is φ = 81141726.

The previous prime is 81141689. The next prime is 81141737. The reversal of 81141727 is 72714118.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81141727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81141737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40570863 + 40570864.

It is an arithmetic number, because the mean of its divisors is an integer number (40570864).

Almost surely, 2^81141727 is an apocalyptic number.

81141727 is a deficient number, since it is larger than the sum of its proper divisors (1).

81141727 is an equidigital number, since it uses as much as digits as its factorization.

81141727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3136, while the sum is 31.

The square root of 81141727 is about 9007.8702810376. The cubic root of 81141727 is about 432.9270767753.

The spelling of 81141727 in words is "eighty-one million, one hundred forty-one thousand, seven hundred twenty-seven".