916491 has 4 divisors (see below), whose sum is σ = 1221992. Its totient is φ = 610992.

The previous prime is 916477. The next prime is 916501. The reversal of 916491 is 194619.

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

It is not a de Polignac number, because 916491 - 2¹¹ = 914443 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 916491.

It is not an unprimeable number, because it can be changed into a prime (916411) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152746 + ... + 152751.

It is an arithmetic number, because the mean of its divisors is an integer number (305498).

2⁹¹⁶⁴⁹¹ is an apocalyptic number.

916491 is a deficient number, since it is larger than the sum of its proper divisors (305501).

916491 is a wasteful number, since it uses less digits than its factorization.

916491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305500.

The product of its digits is 1944, while the sum is 30.

The square root of 916491 is about 957.3353644361. The cubic root of 916491 is about 97.1350723907.

The spelling of 916491 in words is "nine hundred sixteen thousand, four hundred ninety-one".