853421938 has 4 divisors (see below), whose sum is σ = 1280132910. Its totient is φ = 426710968.

The previous prime is 853421893. The next prime is 853421941. The reversal of 853421938 is 839124358.

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

It can be written as a sum of positive squares in only one way, i.e., 845820889 + 7601049 = 29083^2 + 2757^2 .

It is a junction number, because it is equal to n+sod(n) for n = 853421894 and 853421903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213355483 + ... + 213355486.

Almost surely, 2^853421938 is an apocalyptic number.

853421938 is a deficient number, since it is larger than the sum of its proper divisors (426710972).

853421938 is a wasteful number, since it uses less digits than its factorization.

853421938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426710971.

The product of its digits is 207360, while the sum is 43.

The square root of 853421938 is about 29213.3862809500. The cubic root of 853421938 is about 948.5377089513.

The spelling of 853421938 in words is "eight hundred fifty-three million, four hundred twenty-one thousand, nine hundred thirty-eight".