991474 has 24 divisors (see below), whose sum is σ = 1738044. Its totient is φ = 422400.

The previous prime is 991453. The next prime is 991483. The reversal of 991474 is 474199.

991474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 915849 + 75625 = 957^2 + 275^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3994 + ... + 4234.

2⁹⁹¹⁴⁷⁴ is an apocalyptic number.

991474 is a deficient number, since it is larger than the sum of its proper divisors (746570).

991474 is a wasteful number, since it uses less digits than its factorization.

991474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 271 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 991474 is about 995.7278744717. The cubic root of 991474 is about 99.7149884559.

991474 divided by its sum of digits (34) gives a triangular number (29161 = T₂₄₁).

The spelling of 991474 in words is "nine hundred ninety-one thousand, four hundred seventy-four".