853949 has 2 divisors, whose sum is σ = 853950. Its totient is φ = 853948.

The previous prime is 853933. The next prime is 853969. The reversal of 853949 is 949358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573049 + 280900 = 757^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 853949 - 2⁴ = 853933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426974 + 426975.

It is an arithmetic number, because the mean of its divisors is an integer number (426975).

2⁸⁵³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

853949 is a deficient number, since it is larger than the sum of its proper divisors (1).

853949 is an equidigital number, since it uses as much as digits as its factorization.

853949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 853949 is about 924.0936099768. The cubic root of 853949 is about 94.8732936844.

The spelling of 853949 in words is "eight hundred fifty-three thousand, nine hundred forty-nine".