899965 has 8 divisors (see below), whose sum is σ = 1178208. Its totient is φ = 654480.

The previous prime is 899939. The next prime is 899971. The reversal of 899965 is 569998.

899965 = T₃₉₉ + T₄₀₀ + ... + T₄₀₉.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-899965 is a prime.

It is a Duffinian number.

899965 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8127 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (147276).

2⁸⁹⁹⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

899965 is a deficient number, since it is larger than the sum of its proper divisors (278243).

899965 is a wasteful number, since it uses less digits than its factorization.

899965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16379.

The product of its digits is 174960, while the sum is 46.

The square root of 899965 is about 948.6648512515. The cubic root of 899965 is about 96.5476868840.

The spelling of 899965 in words is "eight hundred ninety-nine thousand, nine hundred sixty-five".