853231634 has 4 divisors (see below), whose sum is σ = 1279847454. Its totient is φ = 426615816.

The previous prime is 853231619. The next prime is 853231661. The reversal of 853231634 is 436132358.

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., 517426009 + 335805625 = 22747^2 + 18325^2 .

It is a junction number, because it is equal to n+sod(n) for n = 853231594 and 853231603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213307907 + ... + 213307910.

Almost surely, 2^853231634 is an apocalyptic number.

853231634 is a deficient number, since it is larger than the sum of its proper divisors (426615820).

853231634 is a wasteful number, since it uses less digits than its factorization.

853231634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426615819.

The product of its digits is 51840, while the sum is 35.

The square root of 853231634 is about 29210.1289623993. The cubic root of 853231634 is about 948.4671991089.

The spelling of 853231634 in words is "eight hundred fifty-three million, two hundred thirty-one thousand, six hundred thirty-four".