71073539 has 4 divisors (see below), whose sum is σ = 72726456. Its totient is φ = 69420624.

The previous prime is 71073523. The next prime is 71073631. The reversal of 71073539 is 93537017.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71073539 - 2⁴ = 71073523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71073499 and 71073508.

It is not an unprimeable number, because it can be changed into a prime (71073239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826394 + ... + 826479.

It is an arithmetic number, because the mean of its divisors is an integer number (18181614).

Almost surely, 2^71073539 is an apocalyptic number.

71073539 is a deficient number, since it is larger than the sum of its proper divisors (1652917).

71073539 is a wasteful number, since it uses less digits than its factorization.

71073539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652916.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 71073539 is about 8430.5123806326. The cubic root of 71073539 is about 414.2246888030.

The spelling of 71073539 in words is "seventy-one million, seventy-three thousand, five hundred thirty-nine".