71129099 has 4 divisors (see below), whose sum is σ = 71391840. Its totient is φ = 70866360.

The previous prime is 71129089. The next prime is 71129117. The reversal of 71129099 is 99092117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71129099 - 2²⁰ = 70080523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71129089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130964 + ... + 131505.

It is an arithmetic number, because the mean of its divisors is an integer number (17847960).

Almost surely, 2^71129099 is an apocalyptic number.

71129099 is a deficient number, since it is larger than the sum of its proper divisors (262741).

71129099 is a wasteful number, since it uses less digits than its factorization.

71129099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262740.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 71129099 is about 8433.8069102867. The cubic root of 71129099 is about 414.3325973611.

The spelling of 71129099 in words is "seventy-one million, one hundred twenty-nine thousand, ninety-nine".