71329999 has 8 divisors (see below), whose sum is σ = 77273840. Its totient is φ = 65841048.

The previous prime is 71329987. The next prime is 71330003. The reversal of 71329999 is 99992317.

It is not a de Polignac number, because 71329999 - 2⁷ = 71329871 is a prime.

It is a Duffinian number.

71329999 is a modest number, since divided by 9999 gives 7132 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71329949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14037 + ... + 18430.

It is an arithmetic number, because the mean of its divisors is an integer number (9659230).

Almost surely, 2^71329999 is an apocalyptic number.

71329999 is a deficient number, since it is larger than the sum of its proper divisors (5943841).

71329999 is an equidigital number, since it uses as much as digits as its factorization.

71329999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32506 (or 32480 counting only the distinct ones).

The product of its digits is 275562, while the sum is 49.

The square root of 71329999 is about 8445.7089104468. The cubic root of 71329999 is about 414.7223167794.

The spelling of 71329999 in words is "seventy-one million, three hundred twenty-nine thousand, nine hundred ninety-nine".