83437913 has 8 divisors (see below), whose sum is σ = 89934600. Its totient is φ = 76952448.

The previous prime is 83437909. The next prime is 83437979. The reversal of 83437913 is 31973438.

It can be written as a sum of positive squares in 4 ways, for example, as 19245769 + 64192144 = 4387^2 + 8012^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 83437913 - 2² = 83437909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83433913) 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, 18923 + ... + 22911.

It is an arithmetic number, because the mean of its divisors is an integer number (11241825).

Almost surely, 2^83437913 is an apocalyptic number.

It is an amenable number.

83437913 is a deficient number, since it is larger than the sum of its proper divisors (6496687).

83437913 is a wasteful number, since it uses less digits than its factorization.

83437913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611.

The product of its digits is 54432, while the sum is 38.

The square root of 83437913 is about 9134.4355600114. The cubic root of 83437913 is about 436.9728734949.

The spelling of 83437913 in words is "eighty-three million, four hundred thirty-seven thousand, nine hundred thirteen".