12353891 has 4 divisors (see below), whose sum is σ = 13476984. Its totient is φ = 11230800.

The previous prime is 12353881. The next prime is 12353897. The reversal of 12353891 is 19835321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19835321 = 11 ⋅1803211.

It is a cyclic number.

It is not a de Polignac number, because 12353891 - 2¹⁸ = 12091747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12353897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561530 + ... + 561551.

It is an arithmetic number, because the mean of its divisors is an integer number (3369246).

Almost surely, 2^12353891 is an apocalyptic number.

12353891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12353891 is a deficient number, since it is larger than the sum of its proper divisors (1123093).

12353891 is a wasteful number, since it uses less digits than its factorization.

12353891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123092.

The product of its digits is 6480, while the sum is 32.

The square root of 12353891 is about 3514.8102366984. The cubic root of 12353891 is about 231.1716582936.

The spelling of 12353891 in words is "twelve million, three hundred fifty-three thousand, eight hundred ninety-one".