853770409 has 4 divisors (see below), whose sum is σ = 854214480. Its totient is φ = 853326340.

The previous prime is 853770403. The next prime is 853770427. The reversal of 853770409 is 904077358.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 853770409 - 2¹⁷ = 853639337 is a prime.

It is a super-2 number, since 2×853770409² = 1457847822568054562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853770403) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 219139 + ... + 223000.

It is an arithmetic number, because the mean of its divisors is an integer number (213553620).

Almost surely, 2^853770409 is an apocalyptic number.

It is an amenable number.

853770409 is a deficient number, since it is larger than the sum of its proper divisors (444071).

853770409 is a wasteful number, since it uses less digits than its factorization.

853770409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444070.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 853770409 is about 29219.3499072105. The cubic root of 853770409 is about 948.6667943392. Note that the first 3 decimals are identical.

The spelling of 853770409 in words is "eight hundred fifty-three million, seven hundred seventy thousand, four hundred nine".