1991674 has 8 divisors (see below), whose sum is σ = 3057120. Its totient is φ = 972636.

The previous prime is 1991653. The next prime is 1991677. The reversal of 1991674 is 4761991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1991677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11494 + ... + 11665.

It is an arithmetic number, because the mean of its divisors is an integer number (382140).

2^1991674 is an apocalyptic number.

1991674 is a deficient number, since it is larger than the sum of its proper divisors (1065446).

1991674 is a wasteful number, since it uses less digits than its factorization.

1991674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23204.

The product of its digits is 13608, while the sum is 37.

The square root of 1991674 is about 1411.2668068087. The cubic root of 1991674 is about 125.8170267697.

The spelling of 1991674 in words is "one million, nine hundred ninety-one thousand, six hundred seventy-four".