900859 has 4 divisors (see below), whose sum is σ = 907480. Its totient is φ = 894240.

The previous prime is 900821. The next prime is 900863. The reversal of 900859 is 958009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958009 = 13 ⋅73693.

It is a cyclic number.

It is not a de Polignac number, because 900859 - 2¹³ = 892667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 900859.

It is not an unprimeable number, because it can be changed into a prime (900869) 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, 3102 + ... + 3379.

It is an arithmetic number, because the mean of its divisors is an integer number (226870).

2⁹⁰⁰⁸⁵⁹ is an apocalyptic number.

900859 is a deficient number, since it is larger than the sum of its proper divisors (6621).

900859 is a wasteful number, since it uses less digits than its factorization.

900859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 900859 is about 949.1359228267. The cubic root of 900859 is about 96.5796455592.

The spelling of 900859 in words is "nine hundred thousand, eight hundred fifty-nine".