859799421 has 32 divisors (see below), whose sum is σ = 1391120640. Its totient is φ = 521640000.

The previous prime is 859799371. The next prime is 859799431. The reversal of 859799421 is 124997958.

859799421 is a `hidden beast` number, since 8 + 597 + 9 + 9 + 42 + 1 = 666.

It is not a de Polignac number, because 859799421 - 2¹⁴ = 859783037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859799431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7671 + ... + 42171.

It is an arithmetic number, because the mean of its divisors is an integer number (43472520).

Almost surely, 2^859799421 is an apocalyptic number.

It is an amenable number.

859799421 is a deficient number, since it is larger than the sum of its proper divisors (531321219).

859799421 is a wasteful number, since it uses less digits than its factorization.

859799421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34594 (or 34588 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 859799421 is about 29322.3365542380. The cubic root of 859799421 is about 950.8946036507.

The spelling of 859799421 in words is "eight hundred fifty-nine million, seven hundred ninety-nine thousand, four hundred twenty-one".