938382821 has 4 divisors (see below), whose sum is σ = 938470944. Its totient is φ = 938294700.

The previous prime is 938382793. The next prime is 938382833. The reversal of 938382821 is 128283839.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 938382821 - 2²² = 934188517 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 (938382521) 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, 25475 + ... + 50256.

It is an arithmetic number, because the mean of its divisors is an integer number (234617736).

Almost surely, 2^938382821 is an apocalyptic number.

It is an amenable number.

938382821 is a deficient number, since it is larger than the sum of its proper divisors (88123).

938382821 is a wasteful number, since it uses less digits than its factorization.

938382821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88122.

The product of its digits is 165888, while the sum is 44.

The square root of 938382821 is about 30633.0347990531. The cubic root of 938382821 is about 979.0240252329.

The spelling of 938382821 in words is "nine hundred thirty-eight million, three hundred eighty-two thousand, eight hundred twenty-one".