853749 has 12 divisors (see below), whose sum is σ = 1328236. Its totient is φ = 525312.

The previous prime is 853739. The next prime is 853759. The reversal of 853749 is 947358.

It is an interprime number because it is at equal distance from previous prime (853739) and next prime (853759).

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 651249 = 450^2 + 807^2 .

It is not a de Polignac number, because 853749 - 2⁴ = 853733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3532 + ... + 3765.

2⁸⁵³⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

853749 is a deficient number, since it is larger than the sum of its proper divisors (474487).

853749 is a wasteful number, since it uses less digits than its factorization.

853749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7316 (or 7313 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 853749 is about 923.9853894949. The cubic root of 853749 is about 94.8658864738.

The spelling of 853749 in words is "eight hundred fifty-three thousand, seven hundred forty-nine".