71413537 has 4 divisors (see below), whose sum is σ = 76906900. Its totient is φ = 65920176.

The previous prime is 71413523. The next prime is 71413543. The reversal of 71413537 is 73531417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73531417 = 139 ⋅529003.

It can be written as a sum of positive squares in 2 ways, for example, as 7349521 + 64064016 = 2711^2 + 8004^2 .

It is a cyclic number.

It is not a de Polignac number, because 71413537 - 2⁷ = 71413409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71413499 and 71413508.

It is not an unprimeable number, because it can be changed into a prime (71413567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2746662 + ... + 2746687.

It is an arithmetic number, because the mean of its divisors is an integer number (19226725).

Almost surely, 2^71413537 is an apocalyptic number.

It is an amenable number.

71413537 is a deficient number, since it is larger than the sum of its proper divisors (5493363).

71413537 is a wasteful number, since it uses less digits than its factorization.

71413537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5493362.

The product of its digits is 8820, while the sum is 31.

The square root of 71413537 is about 8450.6530516878. The cubic root of 71413537 is about 414.8841540491.

The spelling of 71413537 in words is "seventy-one million, four hundred thirteen thousand, five hundred thirty-seven".