8681493 has 4 divisors (see below), whose sum is σ = 11575328. Its totient is φ = 5787660.

The previous prime is 8681489. The next prime is 8681503. The reversal of 8681493 is 3941868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8681493 - 2² = 8681489 is a prime.

It is a Duffinian number.

It is a Curzon number.

8681493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8681473) 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, 1446913 + ... + 1446918.

It is an arithmetic number, because the mean of its divisors is an integer number (2893832).

Almost surely, 2^8681493 is an apocalyptic number.

It is an amenable number.

8681493 is a deficient number, since it is larger than the sum of its proper divisors (2893835).

8681493 is a wasteful number, since it uses less digits than its factorization.

8681493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893834.

The product of its digits is 41472, while the sum is 39.

The square root of 8681493 is about 2946.4373402467. The cubic root of 8681493 is about 205.5250707924.

The spelling of 8681493 in words is "eight million, six hundred eighty-one thousand, four hundred ninety-three".