1999674 has 32 divisors (see below), whose sum is σ = 4680000. Its totient is φ = 631152.

The previous prime is 1999667. The next prime is 1999681. The reversal of 1999674 is 4769991.

It is an interprime number because it is at equal distance from previous prime (1999667) and next prime (1999681).

It is a super-2 number, since 2×1999674² = 7997392212552, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (146250).

2^1999674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340000).

1999674 is an abundant number, since it is smaller than the sum of its proper divisors (2680326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999674 is a wasteful number, since it uses less digits than its factorization.

1999674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979 (or 1973 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 1999674 is about 1414.0982992706. The cubic root of 1999674 is about 125.9852590465.

The spelling of 1999674 in words is "one million, nine hundred ninety-nine thousand, six hundred seventy-four".