381023979 has 16 divisors (see below), whose sum is σ = 581962752. Its totient is φ = 217219968.

The previous prime is 381023969. The next prime is 381023983. The reversal of 381023979 is 979320183.

It is not a de Polignac number, because 381023979 - 2⁸ = 381023723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381023979.

It is not an unprimeable number, because it can be changed into a prime (381023969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11859 + ... + 30044.

It is an arithmetic number, because the mean of its divisors is an integer number (36372672).

Almost surely, 2^381023979 is an apocalyptic number.

381023979 is a deficient number, since it is larger than the sum of its proper divisors (200938773).

381023979 is a wasteful number, since it uses less digits than its factorization.

381023979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42346.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 381023979 is about 19519.8355269710. The cubic root of 381023979 is about 724.9656608389.

The spelling of 381023979 in words is "three hundred eighty-one million, twenty-three thousand, nine hundred seventy-nine".