238930397 has 4 divisors (see below), whose sum is σ = 238974780. Its totient is φ = 238886016.

The previous prime is 238930381. The next prime is 238930399. The reversal of 238930397 is 793039832.

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

It can be written as a sum of positive squares in 2 ways, for example, as 105966436 + 132963961 = 10294^2 + 11531^2 .

It is a cyclic number.

It is not a de Polignac number, because 238930397 - 2⁴ = 238930381 is a prime.

It is a super-2 number, since 2×238930397² = 114175469221155218, 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 (238930399) 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, 12788 + ... + 25325.

It is an arithmetic number, because the mean of its divisors is an integer number (59743695).

Almost surely, 2^238930397 is an apocalyptic number.

It is an amenable number.

238930397 is a deficient number, since it is larger than the sum of its proper divisors (44383).

238930397 is an equidigital number, since it uses as much as digits as its factorization.

238930397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44382.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 238930397 is about 15457.3735479220. The cubic root of 238930397 is about 620.5219304307.

The spelling of 238930397 in words is "two hundred thirty-eight million, nine hundred thirty thousand, three hundred ninety-seven".