890345 has 4 divisors (see below), whose sum is σ = 1068420. Its totient is φ = 712272.

The previous prime is 890333. The next prime is 890371. The reversal of 890345 is 543098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543098 = 2 ⋅271549.

It can be written as a sum of positive squares in 2 ways, for example, as 157609 + 732736 = 397^2 + 856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890345 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89030 + ... + 89039.

It is an arithmetic number, because the mean of its divisors is an integer number (267105).

2⁸⁹⁰³⁴⁵ is an apocalyptic number.

It is an amenable number.

890345 is a deficient number, since it is larger than the sum of its proper divisors (178075).

890345 is a wasteful number, since it uses less digits than its factorization.

890345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178074.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 890345 is about 943.5809451234. The cubic root of 890345 is about 96.2024446023.

The spelling of 890345 in words is "eight hundred ninety thousand, three hundred forty-five".