83538493 has 4 divisors (see below), whose sum is σ = 88452540. Its totient is φ = 78624448.

The previous prime is 83538479. The next prime is 83538517. The reversal of 83538493 is 39483538.

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 75116889 + 8421604 = 8667^2 + 2902^2 .

It is a cyclic number.

It is not a de Polignac number, because 83538493 - 2²⁵ = 49984061 is a prime.

It is a super-2 number, since 2×83538493² = 13957359625422098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83535493) 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, 2456998 + ... + 2457031.

It is an arithmetic number, because the mean of its divisors is an integer number (22113135).

Almost surely, 2^83538493 is an apocalyptic number.

It is an amenable number.

83538493 is a deficient number, since it is larger than the sum of its proper divisors (4914047).

83538493 is a wasteful number, since it uses less digits than its factorization.

83538493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914046.

The product of its digits is 311040, while the sum is 43.

The square root of 83538493 is about 9139.9394418125. The cubic root of 83538493 is about 437.1483855683.

The spelling of 83538493 in words is "eighty-three million, five hundred thirty-eight thousand, four hundred ninety-three".