381323123 has 2 divisors, whose sum is σ = 381323124. Its totient is φ = 381323122.

The previous prime is 381323119. The next prime is 381323143. The reversal of 381323123 is 321323183.

It is a weak prime.

It is an emirp because it is prime and its reverse (321323183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381323123 - 2² = 381323119 is a prime.

It is equal to p_20392541 and since 381323123 and 20392541 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 381323092 and 381323101.

It is not a weakly prime, because it can be changed into another prime (381323113) 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 as a sum of consecutive naturals, namely, 190661561 + 190661562.

It is an arithmetic number, because the mean of its divisors is an integer number (190661562).

Almost surely, 2^381323123 is an apocalyptic number.

381323123 is a deficient number, since it is larger than the sum of its proper divisors (1).

381323123 is an equidigital number, since it uses as much as digits as its factorization.

381323123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 381323123 is about 19527.4965881446. The cubic root of 381323123 is about 725.1553360381.

The spelling of 381323123 in words is "three hundred eighty-one million, three hundred twenty-three thousand, one hundred twenty-three".