381846979 has 4 divisors (see below), whose sum is σ = 404308584. Its totient is φ = 359385376.

The previous prime is 381846967. The next prime is 381846991. The reversal of 381846979 is 979648183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979648183 = 9949 ⋅98467.

It is an interprime number because it is at equal distance from previous prime (381846967) and next prime (381846991).

It is a cyclic number.

It is not a de Polignac number, because 381846979 - 2¹⁷ = 381715907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381846379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11230777 + ... + 11230810.

It is an arithmetic number, because the mean of its divisors is an integer number (101077146).

Almost surely, 2^381846979 is an apocalyptic number.

381846979 is a deficient number, since it is larger than the sum of its proper divisors (22461605).

381846979 is a wasteful number, since it uses less digits than its factorization.

381846979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22461604.

The product of its digits is 2612736, while the sum is 55.

The square root of 381846979 is about 19540.9052758566. The cubic root of 381846979 is about 725.4872532731.

The spelling of 381846979 in words is "three hundred eighty-one million, eight hundred forty-six thousand, nine hundred seventy-nine".