71199138 has 16 divisors (see below), whose sum is σ = 142645536. Its totient is φ = 23691840.

The previous prime is 71199131. The next prime is 71199169. The reversal of 71199138 is 83199117.

It is a junction number, because it is equal to n+sod(n) for n = 71199096 and 71199105.

It is not an unprimeable number, because it can be changed into a prime (71199131) 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 in 7 ways as a sum of consecutive naturals, for example, 6448 + ... + 13563.

It is an arithmetic number, because the mean of its divisors is an integer number (8915346).

Almost surely, 2^71199138 is an apocalyptic number.

71199138 is an abundant number, since it is smaller than the sum of its proper divisors (71446398).

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

71199138 is a wasteful number, since it uses less digits than its factorization.

71199138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20609.

The product of its digits is 13608, while the sum is 39.

The square root of 71199138 is about 8437.9581653383. The cubic root of 71199138 is about 414.4685469772.

The spelling of 71199138 in words is "seventy-one million, one hundred ninety-nine thousand, one hundred thirty-eight".