858740459 has 4 divisors (see below), whose sum is σ = 859082280. Its totient is φ = 858398640.

The previous prime is 858740447. The next prime is 858740461. The reversal of 858740459 is 954047858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858740459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (858740479) 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 in 3 ways as a sum of consecutive naturals, for example, 167114 + ... + 172175.

It is an arithmetic number, because the mean of its divisors is an integer number (214770570).

Almost surely, 2^858740459 is an apocalyptic number.

858740459 is a deficient number, since it is larger than the sum of its proper divisors (341821).

858740459 is a wasteful number, since it uses less digits than its factorization.

858740459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341820.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The square root of 858740459 is about 29304.2737326827. The cubic root of 858740459 is about 950.5040571605.

The spelling of 858740459 in words is "eight hundred fifty-eight million, seven hundred forty thousand, four hundred fifty-nine".