853981494 has 8 divisors (see below), whose sum is σ = 1707963000. Its totient is φ = 284660496.

The previous prime is 853981489. The next prime is 853981573. The reversal of 853981494 is 494189358.

It is a sphenic number, since it is the product of 3 distinct primes.

853981494 is an admirable number.

It is a super-3 number, since 3×853981494³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71165119 + ... + 71165130.

It is an arithmetic number, because the mean of its divisors is an integer number (213495375).

Almost surely, 2^853981494 is an apocalyptic number.

853981494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

853981494 is a wasteful number, since it uses less digits than its factorization.

853981494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142330254.

The product of its digits is 1244160, while the sum is 51.

The square root of 853981494 is about 29222.9617595479. The cubic root of 853981494 is about 948.7449702466.

The spelling of 853981494 in words is "eight hundred fifty-three million, nine hundred eighty-one thousand, four hundred ninety-four".