853904797 has 8 divisors (see below), whose sum is σ = 885729240. Its totient is φ = 822239040.

The previous prime is 853904771. The next prime is 853904809. The reversal of 853904797 is 797409358.

It can be written as a sum of positive squares in 4 ways, for example, as 47969476 + 805935321 = 6926^2 + 28389^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 853904797 - 2¹⁹ = 853380509 is a prime.

It is a super-2 number, since 2×853904797² = 1458306804679222418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853904297) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28654 + ... + 50287.

It is an arithmetic number, because the mean of its divisors is an integer number (110716155).

Almost surely, 2^853904797 is an apocalyptic number.

It is an amenable number.

853904797 is a deficient number, since it is larger than the sum of its proper divisors (31824443).

853904797 is a wasteful number, since it uses less digits than its factorization.

853904797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79343.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 853904797 is about 29221.6494572089. The cubic root of 853904797 is about 948.7165667929.

The spelling of 853904797 in words is "eight hundred fifty-three million, nine hundred four thousand, seven hundred ninety-seven".