71199243 has 28 divisors (see below), whose sum is σ = 107918448. Its totient is φ = 46947600.

The previous prime is 71199239. The next prime is 71199257. The reversal of 71199243 is 34299117.

It is not a de Polignac number, because 71199243 - 2² = 71199239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71199198 and 71199207.

It is not an unprimeable number, because it can be changed into a prime (71199223) 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 27 ways as a sum of consecutive naturals, for example, 73146 + ... + 74112.

Almost surely, 2^71199243 is an apocalyptic number.

71199243 is a deficient number, since it is larger than the sum of its proper divisors (36719205).

71199243 is an equidigital number, since it uses as much as digits as its factorization.

71199243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1071 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 71199243 is about 8437.9643872204. The cubic root of 71199243 is about 414.4687507211.

The spelling of 71199243 in words is "seventy-one million, one hundred ninety-nine thousand, two hundred forty-three".