81414079 has 2 divisors, whose sum is σ = 81414080. Its totient is φ = 81414078.

The previous prime is 81414059. The next prime is 81414083. The reversal of 81414079 is 97041418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81414079 - 2²¹ = 79316927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81414059) 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, 40707039 + 40707040.

It is an arithmetic number, because the mean of its divisors is an integer number (40707040).

Almost surely, 2^81414079 is an apocalyptic number.

81414079 is a deficient number, since it is larger than the sum of its proper divisors (1).

81414079 is an equidigital number, since it uses as much as digits as its factorization.

81414079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 81414079 is about 9022.9750636916. The cubic root of 81414079 is about 433.4109087283.

The spelling of 81414079 in words is "eighty-one million, four hundred fourteen thousand, seventy-nine".