71033389 has 6 divisors (see below), whose sum is σ = 82630734. Its totient is φ = 60885720.

The previous prime is 71033387. The next prime is 71033411. The reversal of 71033389 is 98333017.

It can be written as a sum of positive squares in only one way, i.e., 69856164 + 1177225 = 8358^2 + 1085^2 .

It is not a de Polignac number, because 71033389 - 2¹ = 71033387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71033387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 724782 + ... + 724879.

It is an arithmetic number, because the mean of its divisors is an integer number (13771789).

Almost surely, 2^71033389 is an apocalyptic number.

It is an amenable number.

71033389 is a deficient number, since it is larger than the sum of its proper divisors (11597345).

71033389 is a wasteful number, since it uses less digits than its factorization.

71033389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449675 (or 1449668 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 71033389 is about 8428.1308129383. The cubic root of 71033389 is about 414.1466745182.

The spelling of 71033389 in words is "seventy-one million, thirty-three thousand, three hundred eighty-nine".