853669 has 2 divisors, whose sum is σ = 853670. Its totient is φ = 853668.

The previous prime is 853667. The next prime is 853687. The reversal of 853669 is 966358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744769 + 108900 = 863^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 853669 - 2¹ = 853667 is a prime.

It is a super-2 number, since 2×853669² = 1457501523122, which contains 22 as substring.

Together with 853667, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426834 + 426835.

It is an arithmetic number, because the mean of its divisors is an integer number (426835).

2⁸⁵³⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

853669 is a deficient number, since it is larger than the sum of its proper divisors (1).

853669 is an equidigital number, since it uses as much as digits as its factorization.

853669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 853669 is about 923.9420977529. The cubic root of 853669 is about 94.8629232656.

The spelling of 853669 in words is "eight hundred fifty-three thousand, six hundred sixty-nine".