238821693 has 12 divisors (see below), whose sum is σ = 350009184. Its totient is φ = 144740200.

The previous prime is 238821689. The next prime is 238821749. The reversal of 238821693 is 396128832.

238821693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 238821693 - 2² = 238821689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238821683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328593 + ... + 329318.

It is an arithmetic number, because the mean of its divisors is an integer number (29167432).

Almost surely, 2^238821693 is an apocalyptic number.

It is an amenable number.

238821693 is a deficient number, since it is larger than the sum of its proper divisors (111187491).

238821693 is a wasteful number, since it uses less digits than its factorization.

238821693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657936 (or 657925 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 238821693 is about 15453.8568972280. The cubic root of 238821693 is about 620.4278117405.

The spelling of 238821693 in words is "two hundred thirty-eight million, eight hundred twenty-one thousand, six hundred ninety-three".