683212111 has 4 divisors (see below), whose sum is σ = 686195800. Its totient is φ = 680228424.

The previous prime is 683212097. The next prime is 683212147. The reversal of 683212111 is 111212386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111212386 = 2 ⋅55606193.

It is a cyclic number.

It is not a de Polignac number, because 683212111 - 2¹¹ = 683210063 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 (683219111) 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, 1491501 + ... + 1491958.

It is an arithmetic number, because the mean of its divisors is an integer number (171548950).

Almost surely, 2^683212111 is an apocalyptic number.

683212111 is a deficient number, since it is larger than the sum of its proper divisors (2983689).

683212111 is a wasteful number, since it uses less digits than its factorization.

683212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983688.

The product of its digits is 576, while the sum is 25.

The square root of 683212111 is about 26138.3264766511. The cubic root of 683212111 is about 880.7483780977.

Adding to 683212111 its reverse (111212386), we get a palindrome (794424497).

The spelling of 683212111 in words is "six hundred eighty-three million, two hundred twelve thousand, one hundred eleven".