71099872 has 12 divisors (see below), whose sum is σ = 139977936. Its totient is φ = 35549920.

The previous prime is 71099839. The next prime is 71099879. The reversal of 71099872 is 27899017.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71099879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110904 + ... + 1110967.

It is an arithmetic number, because the mean of its divisors is an integer number (11664828).

Almost surely, 2^71099872 is an apocalyptic number.

It is an amenable number.

71099872 is a deficient number, since it is larger than the sum of its proper divisors (68878064).

71099872 is a wasteful number, since it uses less digits than its factorization.

71099872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221881 (or 2221873 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 71099872 is about 8432.0740034703. The cubic root of 71099872 is about 414.2758397284.

The spelling of 71099872 in words is "seventy-one million, ninety-nine thousand, eight hundred seventy-two".