899947 has 4 divisors (see below), whose sum is σ = 920920. Its totient is φ = 878976.

The previous prime is 899939. The next prime is 899971. The reversal of 899947 is 749998.

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

It is a cyclic number.

It is not a de Polignac number, because 899947 - 2³ = 899939 is a prime.

It is a Duffinian number.

899947 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 899897 and 899906.

It is not an unprimeable number, because it can be changed into a prime (899917) 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, 10422 + ... + 10507.

It is an arithmetic number, because the mean of its divisors is an integer number (230230).

2⁸⁹⁹⁹⁴⁷ is an apocalyptic number.

899947 is a deficient number, since it is larger than the sum of its proper divisors (20973).

899947 is a wasteful number, since it uses less digits than its factorization.

899947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20972.

The product of its digits is 163296, while the sum is 46.

The square root of 899947 is about 948.6553641866. The cubic root of 899947 is about 96.5470432035.

The spelling of 899947 in words is "eight hundred ninety-nine thousand, nine hundred forty-seven".