123381493 has 4 divisors (see below), whose sum is σ = 123403840. Its totient is φ = 123359148.

The previous prime is 123381487. The next prime is 123381521. The reversal of 123381493 is 394183321.

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 a de Polignac number, because none of the positive numbers 2^k-123381493 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 (123381443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3778 + ... + 16156.

It is an arithmetic number, because the mean of its divisors is an integer number (30850960).

Almost surely, 2^123381493 is an apocalyptic number.

It is an amenable number.

123381493 is a deficient number, since it is larger than the sum of its proper divisors (22347).

123381493 is an equidigital number, since it uses as much as digits as its factorization.

123381493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22346.

The product of its digits is 15552, while the sum is 34.

The square root of 123381493 is about 11107.7222237505. The cubic root of 123381493 is about 497.8326090752.

It can be divided in two parts, 12338 and 1493, that added together give a palindrome (13831).

The spelling of 123381493 in words is "one hundred twenty-three million, three hundred eighty-one thousand, four hundred ninety-three".