71009899 has 8 divisors (see below), whose sum is σ = 72818240. Its totient is φ = 69208776.

The previous prime is 71009879. The next prime is 71009929. The reversal of 71009899 is 99890017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71009899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71009849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22012 + ... + 25030.

It is an arithmetic number, because the mean of its divisors is an integer number (9102280).

Almost surely, 2^71009899 is an apocalyptic number.

71009899 is a deficient number, since it is larger than the sum of its proper divisors (1808341).

71009899 is a wasteful number, since it uses less digits than its factorization.

71009899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 71009899 is about 8426.7371502854. The cubic root of 71009899 is about 414.1010181583.

The spelling of 71009899 in words is "seventy-one million, nine thousand, eight hundred ninety-nine".