81498127 has 2 divisors, whose sum is σ = 81498128. Its totient is φ = 81498126.

The previous prime is 81498107. The next prime is 81498133. The reversal of 81498127 is 72189418.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81498127 - 2¹⁵ = 81465359 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 81498127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81498107) 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, 40749063 + 40749064.

It is an arithmetic number, because the mean of its divisors is an integer number (40749064).

Almost surely, 2^81498127 is an apocalyptic number.

81498127 is a deficient number, since it is larger than the sum of its proper divisors (1).

81498127 is an equidigital number, since it uses as much as digits as its factorization.

81498127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The square root of 81498127 is about 9027.6313061622. The cubic root of 81498127 is about 433.5600016633.

The spelling of 81498127 in words is "eighty-one million, four hundred ninety-eight thousand, one hundred twenty-seven".