8143693 has 4 divisors (see below), whose sum is σ = 8424540. Its totient is φ = 7862848.

The previous prime is 8143687. The next prime is 8143721. The reversal of 8143693 is 3963418.

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 6061444 + 2082249 = 2462^2 + 1443^2 .

It is a cyclic number.

It is not a de Polignac number, because 8143693 - 2¹⁷ = 8012621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8143613) 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, 140380 + ... + 140437.

It is an arithmetic number, because the mean of its divisors is an integer number (2106135).

Almost surely, 2^8143693 is an apocalyptic number.

It is an amenable number.

8143693 is a deficient number, since it is larger than the sum of its proper divisors (280847).

8143693 is a wasteful number, since it uses less digits than its factorization.

8143693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280846.

The product of its digits is 15552, while the sum is 34.

The square root of 8143693 is about 2853.7156480631. The cubic root of 8143693 is about 201.1903430289.

It can be divided in two parts, 8143 and 693, that added together give a square (8836 = 94²).

The spelling of 8143693 in words is "eight million, one hundred forty-three thousand, six hundred ninety-three".