851953 has 2 divisors, whose sum is σ = 851954. Its totient is φ = 851952.

The previous prime is 851899. The next prime is 851957. The reversal of 851953 is 359158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 651249 + 200704 = 807^2 + 448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851953 is a prime.

It is not a weakly prime, because it can be changed into another prime (851957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425976 + 425977.

It is an arithmetic number, because the mean of its divisors is an integer number (425977).

2⁸⁵¹⁹⁵³ is an apocalyptic number.

It is an amenable number.

851953 is a deficient number, since it is larger than the sum of its proper divisors (1).

851953 is an equidigital number, since it uses as much as digits as its factorization.

851953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 851953 is about 923.0130009919. The cubic root of 851953 is about 94.7993178276.

The spelling of 851953 in words is "eight hundred fifty-one thousand, nine hundred fifty-three".