853521049 has 2 divisors, whose sum is σ = 853521050. Its totient is φ = 853521048.

The previous prime is 853521043. The next prime is 853521073. The reversal of 853521049 is 940125358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 797045824 + 56475225 = 28232^2 + 7515^2 .

It is a cyclic number.

It is not a de Polignac number, because 853521049 - 2¹³ = 853512857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 853520999 and 853521017.

It is not a weakly prime, because it can be changed into another prime (853521043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426760524 + 426760525.

It is an arithmetic number, because the mean of its divisors is an integer number (426760525).

Almost surely, 2^853521049 is an apocalyptic number.

It is an amenable number.

853521049 is a deficient number, since it is larger than the sum of its proper divisors (1).

853521049 is an equidigital number, since it uses as much as digits as its factorization.

853521049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 853521049 is about 29215.0825602119. The cubic root of 853521049 is about 948.5744265770.

It can be divided in two parts, 8535 and 21049, that added together give a square (29584 = 172²).

The spelling of 853521049 in words is "eight hundred fifty-three million, five hundred twenty-one thousand, forty-nine".