81514127 has 2 divisors, whose sum is σ = 81514128. Its totient is φ = 81514126.

The previous prime is 81514091. The next prime is 81514141. The reversal of 81514127 is 72141518.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81514127 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81514127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81511127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40757063 + 40757064.

It is an arithmetic number, because the mean of its divisors is an integer number (40757064).

Almost surely, 2^81514127 is an apocalyptic number.

81514127 is a deficient number, since it is larger than the sum of its proper divisors (1).

81514127 is an equidigital number, since it uses as much as digits as its factorization.

81514127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 29.

The square root of 81514127 is about 9028.5174308964. The cubic root of 81514127 is about 433.5883724835.

The spelling of 81514127 in words is "eighty-one million, five hundred fourteen thousand, one hundred twenty-seven".