8421693 has 16 divisors (see below), whose sum is σ = 13509120. Its totient is φ = 4558896.

The previous prime is 8421653. The next prime is 8421697. The reversal of 8421693 is 3961248.

It is not a de Polignac number, because 8421693 - 2¹⁰ = 8420669 is a prime.

It is a d-powerful number, because it can be written as 8⁵ + 4³ + 2²³ + 1 + 6³ + 9 + 3³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10155 + ... + 10952.

It is an arithmetic number, because the mean of its divisors is an integer number (844320).

Almost surely, 2^8421693 is an apocalyptic number.

It is an amenable number.

8421693 is a deficient number, since it is larger than the sum of its proper divisors (5087427).

8421693 is a wasteful number, since it uses less digits than its factorization.

8421693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21136.

The product of its digits is 10368, while the sum is 33.

The square root of 8421693 is about 2902.0153342117. The cubic root of 8421693 is about 203.4541105146.

The spelling of 8421693 in words is "eight million, four hundred twenty-one thousand, six hundred ninety-three".