899405 has 16 divisors (see below), whose sum is σ = 1182384. Its totient is φ = 652800.

The previous prime is 899401. The next prime is 899413. The reversal of 899405 is 504998.

It can be written as a sum of positive squares in 8 ways, for example, as 4489 + 894916 = 67^2 + 946^2 .

It is not a de Polignac number, because 899405 - 2² = 899401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6497 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (73899).

2⁸⁹⁹⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

899405 is a deficient number, since it is larger than the sum of its proper divisors (282979).

899405 is a wasteful number, since it uses less digits than its factorization.

899405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 899405 is about 948.3696536689. The cubic root of 899405 is about 96.5276572448.

The spelling of 899405 in words is "eight hundred ninety-nine thousand, four hundred five".