71899 has 2 divisors, whose sum is σ = 71900. Its totient is φ = 71898.

The previous prime is 71887. The next prime is 71909. The reversal of 71899 is 99817.

It is a strong prime.

It is an emirp because it is prime and its reverse (99817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71899 - 2⁵ = 71867 is a prime.

71899 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (71809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35949 + 35950.

It is an arithmetic number, because the mean of its divisors is an integer number (35950).

2⁷¹⁸⁹⁹ is an apocalyptic number.

71899 is a deficient number, since it is larger than the sum of its proper divisors (1).

71899 is an equidigital number, since it uses as much as digits as its factorization.

71899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 71899 is about 268.1398888640. The cubic root of 71899 is about 41.5822147223.

The spelling of 71899 in words is "seventy-one thousand, eight hundred ninety-nine".