71735513 has 4 divisors (see below), whose sum is σ = 72541620. Its totient is φ = 70929408.

The previous prime is 71735497. The next prime is 71735533. The reversal of 71735513 is 31553717.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10316944 + 61418569 = 3212^2 + 7837^2 .

It is a cyclic number.

It is not a de Polignac number, because 71735513 - 2⁴ = 71735497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71735513.

It is not an unprimeable number, because it can be changed into a prime (71735533) 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, 402920 + ... + 403097.

It is an arithmetic number, because the mean of its divisors is an integer number (18135405).

Almost surely, 2^71735513 is an apocalyptic number.

It is an amenable number.

71735513 is a deficient number, since it is larger than the sum of its proper divisors (806107).

71735513 is an equidigital number, since it uses as much as digits as its factorization.

71735513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806106.

The product of its digits is 11025, while the sum is 32.

The square root of 71735513 is about 8469.6819893075. The cubic root of 71735513 is about 415.5067366840.

The spelling of 71735513 in words is "seventy-one million, seven hundred thirty-five thousand, five hundred thirteen".