238666413 has 4 divisors (see below), whose sum is σ = 318221888. Its totient is φ = 159110940.

The previous prime is 238666409. The next prime is 238666457. The reversal of 238666413 is 314666832.

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 not a de Polignac number, because 238666413 - 2² = 238666409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238666403) 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, 39777733 + ... + 39777738.

It is an arithmetic number, because the mean of its divisors is an integer number (79555472).

Almost surely, 2^238666413 is an apocalyptic number.

It is an amenable number.

238666413 is a deficient number, since it is larger than the sum of its proper divisors (79555475).

238666413 is an equidigital number, since it uses as much as digits as its factorization.

238666413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79555474.

The product of its digits is 124416, while the sum is 39.

The square root of 238666413 is about 15448.8320917796. The cubic root of 238666413 is about 620.2933168142.

The spelling of 238666413 in words is "two hundred thirty-eight million, six hundred sixty-six thousand, four hundred thirteen".