381864123 has 12 divisors (see below), whose sum is σ = 564409560. Its totient is φ = 248655456.

The previous prime is 381864113. The next prime is 381864137. The reversal of 381864123 is 321468183.

381864123 is a `hidden beast` number, since 3 + 8 + 1 + 8 + 641 + 2 + 3 = 666.

It is not a de Polignac number, because 381864123 - 2²¹ = 379766971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381864113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 492978 + ... + 493751.

It is an arithmetic number, because the mean of its divisors is an integer number (47034130).

Almost surely, 2^381864123 is an apocalyptic number.

381864123 is a deficient number, since it is larger than the sum of its proper divisors (182545437).

381864123 is a wasteful number, since it uses less digits than its factorization.

381864123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986778 (or 986775 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 381864123 is about 19541.3439404766. The cubic root of 381864123 is about 725.4981106480.

The spelling of 381864123 in words is "three hundred eighty-one million, eight hundred sixty-four thousand, one hundred twenty-three".