71209116 has 36 divisors (see below), whose sum is σ = 196365624. Its totient is φ = 21578400.

The previous prime is 71209109. The next prime is 71209121. The reversal of 71209116 is 61190217.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71209116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89515 + ... + 90306.

Almost surely, 2^71209116 is an apocalyptic number.

It is an amenable number.

71209116 is an abundant number, since it is smaller than the sum of its proper divisors (125156508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71209116 is a wasteful number, since it uses less digits than its factorization.

71209116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179842 (or 179837 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 71209116 is about 8438.5494014078. The cubic root of 71209116 is about 414.4879075767.

The spelling of 71209116 in words is "seventy-one million, two hundred nine thousand, one hundred sixteen".