71383613 has 8 divisors (see below), whose sum is σ = 82730880. Its totient is φ = 60323760.

The previous prime is 71383601. The next prime is 71383657. The reversal of 71383613 is 31638317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71383613 - 2⁴ = 71383597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71383613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71383673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71318 + ... + 72311.

It is an arithmetic number, because the mean of its divisors is an integer number (10341360).

Almost surely, 2^71383613 is an apocalyptic number.

It is an amenable number.

71383613 is a deficient number, since it is larger than the sum of its proper divisors (11347267).

71383613 is a wasteful number, since it uses less digits than its factorization.

71383613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143707.

The product of its digits is 9072, while the sum is 32.

The square root of 71383613 is about 8448.8823521221. The cubic root of 71383613 is about 414.8261971200.

The spelling of 71383613 in words is "seventy-one million, three hundred eighty-three thousand, six hundred thirteen".