238779421 has 4 divisors (see below), whose sum is σ = 239032512. Its totient is φ = 238526332.

The previous prime is 238779383. The next prime is 238779451. The reversal of 238779421 is 124977832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238779421 - 2¹¹ = 238777373 is a prime.

It is a super-2 number, since 2×238779421² = 114031223786190482, 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 (238779451) 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 in 3 ways as a sum of consecutive naturals, for example, 125125 + ... + 127018.

It is an arithmetic number, because the mean of its divisors is an integer number (59758128).

Almost surely, 2^238779421 is an apocalyptic number.

It is an amenable number.

238779421 is a deficient number, since it is larger than the sum of its proper divisors (253091).

238779421 is an equidigital number, since it uses as much as digits as its factorization.

238779421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253090.

The product of its digits is 169344, while the sum is 43.

The square root of 238779421 is about 15452.4891522369. The cubic root of 238779421 is about 620.3912038544.

The spelling of 238779421 in words is "two hundred thirty-eight million, seven hundred seventy-nine thousand, four hundred twenty-one".