238979381 has 4 divisors (see below), whose sum is σ = 239016492. Its totient is φ = 238942272.

The previous prime is 238979369. The next prime is 238979393. The reversal of 238979381 is 183979832.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (238979369) and next prime (238979393).

It can be written as a sum of positive squares in 2 ways, for example, as 154504900 + 84474481 = 12430^2 + 9191^2 .

It is a cyclic number.

It is not a de Polignac number, because 238979381 - 2⁶ = 238979317 is a prime.

It is a super-2 number, since 2×238979381² = 114222289086286322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238979281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6116 + ... + 22701.

It is an arithmetic number, because the mean of its divisors is an integer number (59754123).

Almost surely, 2^238979381 is an apocalyptic number.

It is an amenable number.

238979381 is a deficient number, since it is larger than the sum of its proper divisors (37111).

238979381 is an equidigital number, since it uses as much as digits as its factorization.

238979381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37110.

The product of its digits is 653184, while the sum is 50.

The square root of 238979381 is about 15458.9579532386. The cubic root of 238979381 is about 620.5643326947.

The spelling of 238979381 in words is "two hundred thirty-eight million, nine hundred seventy-nine thousand, three hundred eighty-one".