859992061 has 2 divisors, whose sum is σ = 859992062. Its totient is φ = 859992060.

The previous prime is 859992059. The next prime is 859992113. The reversal of 859992061 is 160299958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463583961 + 396408100 = 21531^2 + 19910^2 .

It is a cyclic number.

It is not a de Polignac number, because 859992061 - 2¹ = 859992059 is a prime.

Together with 859992059, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 859991996 and 859992014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859992031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429996030 + 429996031.

It is an arithmetic number, because the mean of its divisors is an integer number (429996031).

Almost surely, 2^859992061 is an apocalyptic number.

It is an amenable number.

859992061 is a deficient number, since it is larger than the sum of its proper divisors (1).

859992061 is an equidigital number, since it uses as much as digits as its factorization.

859992061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 859992061 is about 29325.6212380914. The cubic root of 859992061 is about 950.9656150413.

The spelling of 859992061 in words is "eight hundred fifty-nine million, nine hundred ninety-two thousand, sixty-one".