83547913 has 4 divisors (see below), whose sum is σ = 83576340. Its totient is φ = 83519488.

The previous prime is 83547899. The next prime is 83547923. The reversal of 83547913 is 31974538.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31974538 = 2 ⋅15987269.

It can be written as a sum of positive squares in 2 ways, for example, as 28387584 + 55160329 = 5328^2 + 7427^2 .

It is a cyclic number.

It is not a de Polignac number, because 83547913 - 2¹³ = 83539721 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83547923) 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, 9220 + ... + 15877.

It is an arithmetic number, because the mean of its divisors is an integer number (20894085).

Almost surely, 2^83547913 is an apocalyptic number.

It is an amenable number.

83547913 is a deficient number, since it is larger than the sum of its proper divisors (28427).

83547913 is a wasteful number, since it uses less digits than its factorization.

83547913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28426.

The product of its digits is 90720, while the sum is 40.

The square root of 83547913 is about 9140.4547479871. The cubic root of 83547913 is about 437.1648162494.

The spelling of 83547913 in words is "eighty-three million, five hundred forty-seven thousand, nine hundred thirteen".