985311 has 8 divisors (see below), whose sum is σ = 1459760. Its totient is φ = 656856.

The previous prime is 985307. The next prime is 985331. The reversal of 985311 is 113589.

It is not a de Polignac number, because 985311 - 2² = 985307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 36493 = 985311 / (9 + 8 + 5 + 3 + 1 + 1).

It is a Duffinian number.

985311 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18220 + ... + 18273.

It is an arithmetic number, because the mean of its divisors is an integer number (182470).

2⁹⁸⁵³¹¹ is an apocalyptic number.

985311 is a deficient number, since it is larger than the sum of its proper divisors (474449).

985311 is a wasteful number, since it uses less digits than its factorization.

985311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36502 (or 36496 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 985311 is about 992.6283292351. The cubic root of 985311 is about 99.5079495008.

It can be divided in two parts, 985 and 311, that added together give a 4-th power (1296 = 6⁴).

The spelling of 985311 in words is "nine hundred eighty-five thousand, three hundred eleven".