858923047 has 4 divisors (see below), whose sum is σ = 859005400. Its totient is φ = 858840696.

The previous prime is 858922993. The next prime is 858923071. The reversal of 858923047 is 740329858.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858923047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 858922988 and 858923006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858923647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22797 + ... + 47302.

It is an arithmetic number, because the mean of its divisors is an integer number (214751350).

Almost surely, 2^858923047 is an apocalyptic number.

858923047 is a deficient number, since it is larger than the sum of its proper divisors (82353).

858923047 is a wasteful number, since it uses less digits than its factorization.

858923047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82352.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 858923047 is about 29307.3889488641. The cubic root of 858923047 is about 950.5714187380.

The spelling of 858923047 in words is "eight hundred fifty-eight million, nine hundred twenty-three thousand, forty-seven".