81414899 has 2 divisors, whose sum is σ = 81414900. Its totient is φ = 81414898.

The previous prime is 81414881. The next prime is 81414901. The reversal of 81414899 is 99841418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81414899 - 2¹² = 81410803 is a prime.

Together with 81414901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81414859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40707449 + 40707450.

It is an arithmetic number, because the mean of its divisors is an integer number (40707450).

Almost surely, 2^81414899 is an apocalyptic number.

81414899 is a deficient number, since it is larger than the sum of its proper divisors (1).

81414899 is an equidigital number, since it uses as much as digits as its factorization.

81414899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The square root of 81414899 is about 9023.0205031353. The cubic root of 81414899 is about 433.4123638237.

The spelling of 81414899 in words is "eighty-one million, four hundred fourteen thousand, eight hundred ninety-nine".