899858 has 4 divisors (see below), whose sum is σ = 1349790. Its totient is φ = 449928.

The previous prime is 899851. The next prime is 899863. The reversal of 899858 is 858998.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 889249 + 10609 = 943^2 + 103^2 .

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 899858.

It is not an unprimeable number, because it can be changed into a prime (899851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224963 + ... + 224966.

2⁸⁹⁹⁸⁵⁸ is an apocalyptic number.

899858 is a deficient number, since it is larger than the sum of its proper divisors (449932).

899858 is a wasteful number, since it uses less digits than its factorization.

899858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449931.

The product of its digits is 207360, while the sum is 47.

The square root of 899858 is about 948.6084545269. The cubic root of 899858 is about 96.5438604345.

Subtracting from 899858 its sum of digits (47), we obtain a triangular number (899811 = T₁₃₄₁).

The spelling of 899858 in words is "eight hundred ninety-nine thousand, eight hundred fifty-eight".