890731 has 4 divisors (see below), whose sum is σ = 893200. Its totient is φ = 888264.

The previous prime is 890717. The next prime is 890737. The reversal of 890731 is 137098.

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

It is a cyclic number.

It is not a de Polignac number, because 890731 - 2¹¹ = 888683 is a prime.

It is a super-2 number, since 2×890731² = 1586803428722, which contains 22 as substring.

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 890731.

It is not an unprimeable number, because it can be changed into a prime (890737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (223300).

2⁸⁹⁰⁷³¹ is an apocalyptic number.

890731 is a deficient number, since it is larger than the sum of its proper divisors (2469).

890731 is a wasteful number, since it uses less digits than its factorization.

890731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 890731 is about 943.7854629099. The cubic root of 890731 is about 96.2163451234.

The spelling of 890731 in words is "eight hundred ninety thousand, seven hundred thirty-one".