71321699 has 2 divisors, whose sum is σ = 71321700. Its totient is φ = 71321698.

The previous prime is 71321693. The next prime is 71321711. The reversal of 71321699 is 99612317.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71321699 - 2²⁰ = 70273123 is a prime.

It is not a weakly prime, because it can be changed into another prime (71321693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35660849 + 35660850.

It is an arithmetic number, because the mean of its divisors is an integer number (35660850).

Almost surely, 2^71321699 is an apocalyptic number.

71321699 is a deficient number, since it is larger than the sum of its proper divisors (1).

71321699 is an equidigital number, since it uses as much as digits as its factorization.

71321699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 38.

The square root of 71321699 is about 8445.2175223614. The cubic root of 71321699 is about 414.7062303791.

The spelling of 71321699 in words is "seventy-one million, three hundred twenty-one thousand, six hundred ninety-nine".