916389 has 24 divisors (see below), whose sum is σ = 1460160. Its totient is φ = 551232.

The previous prime is 916387. The next prime is 916411. The reversal of 916389 is 983619.

It is not a de Polignac number, because 916389 - 2¹ = 916387 is a prime.

916389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3817 + ... + 4049.

It is an arithmetic number, because the mean of its divisors is an integer number (60840).

2⁹¹⁶³⁸⁹ is an apocalyptic number.

It is an amenable number.

916389 is a deficient number, since it is larger than the sum of its proper divisors (543771).

916389 is a wasteful number, since it uses less digits than its factorization.

916389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 278 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 916389 is about 957.2820900863. The cubic root of 916389 is about 97.1314687383.

The spelling of 916389 in words is "nine hundred sixteen thousand, three hundred eighty-nine".