71489205 has 36 divisors (see below), whose sum is σ = 128402820. Its totient is φ = 36793344.

The previous prime is 71489183. The next prime is 71489213. The reversal of 71489205 is 50298417.

It can be written as a sum of positive squares in 6 ways, for example, as 221841 + 71267364 = 471^2 + 8442^2 .

It is not a de Polignac number, because 71489205 - 2⁶ = 71489141 is a prime.

It is a super-2 number, since 2×71489205² = 10221412863064050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71489205.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 36901 + ... + 38789.

It is an arithmetic number, because the mean of its divisors is an integer number (3566745).

Almost surely, 2^71489205 is an apocalyptic number.

It is an amenable number.

71489205 is a deficient number, since it is larger than the sum of its proper divisors (56913615).

71489205 is a wasteful number, since it uses less digits than its factorization.

71489205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 71489205 is about 8455.1289168173. The cubic root of 71489205 is about 415.0306359539.

The spelling of 71489205 in words is "seventy-one million, four hundred eighty-nine thousand, two hundred five".