238724669 has 4 divisors (see below), whose sum is σ = 238755996. Its totient is φ = 238693344.

The previous prime is 238724657. The next prime is 238724677. The reversal of 238724669 is 966427832.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 187416100 + 51308569 = 13690^2 + 7163^2 .

It is a cyclic number.

It is not a de Polignac number, because 238724669 - 2⁸ = 238724413 is a prime.

It is a super-2 number, since 2×238724669² = 113978935178319122, 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 (238724639) 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, 3977 + ... + 22209.

It is an arithmetic number, because the mean of its divisors is an integer number (59688999).

Almost surely, 2^238724669 is an apocalyptic number.

It is an amenable number.

238724669 is a deficient number, since it is larger than the sum of its proper divisors (31327).

238724669 is a wasteful number, since it uses less digits than its factorization.

238724669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31326.

The product of its digits is 870912, while the sum is 47.

The square root of 238724669 is about 15450.7174267087. The cubic root of 238724669 is about 620.3437817669.

The spelling of 238724669 in words is "two hundred thirty-eight million, seven hundred twenty-four thousand, six hundred sixty-nine".