12319381 has 4 divisors (see below), whose sum is σ = 12416512. Its totient is φ = 12222252.

The previous prime is 12319361. The next prime is 12319397. The reversal of 12319381 is 18391321.

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 a cyclic number.

It is not a de Polignac number, because 12319381 - 2⁷ = 12319253 is a prime.

It is a super-2 number, since 2×12319381² = 303534296446322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12319361) 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, 48375 + ... + 48628.

It is an arithmetic number, because the mean of its divisors is an integer number (3104128).

Almost surely, 2^12319381 is an apocalyptic number.

It is an amenable number.

12319381 is a deficient number, since it is larger than the sum of its proper divisors (97131).

12319381 is an equidigital number, since it uses as much as digits as its factorization.

12319381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97130.

The product of its digits is 1296, while the sum is 28.

The square root of 12319381 is about 3509.8975768532. The cubic root of 12319381 is about 230.9562019123.

The spelling of 12319381 in words is "twelve million, three hundred nineteen thousand, three hundred eighty-one".