859493521 has 2 divisors, whose sum is σ = 859493522. Its totient is φ = 859493520.

The previous prime is 859493447. The next prime is 859493539. The reversal of 859493521 is 125394958.

859493521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 780923025 + 78570496 = 27945^2 + 8864^2 .

It is a cyclic number.

It is not a de Polignac number, because 859493521 - 2¹³ = 859485329 is a prime.

It is a super-2 number, since 2×859493521² = 1477458225281954882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (859493221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429746760 + 429746761.

It is an arithmetic number, because the mean of its divisors is an integer number (429746761).

Almost surely, 2^859493521 is an apocalyptic number.

It is an amenable number.

859493521 is a deficient number, since it is larger than the sum of its proper divisors (1).

859493521 is an equidigital number, since it uses as much as digits as its factorization.

859493521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 46.

The square root of 859493521 is about 29317.1199301705. The cubic root of 859493521 is about 950.7818203064.

The spelling of 859493521 in words is "eight hundred fifty-nine million, four hundred ninety-three thousand, five hundred twenty-one".