1997849 has 8 divisors (see below), whose sum is σ = 2382720. Its totient is φ = 1637856.

The previous prime is 1997843. The next prime is 1997851. The reversal of 1997849 is 9487991.

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

It is a cyclic number.

It is not a de Polignac number, because 1997849 - 2⁴ = 1997833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1997843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6044 + ... + 6365.

It is an arithmetic number, because the mean of its divisors is an integer number (297840).

2^1997849 is an apocalyptic number.

It is an amenable number.

1997849 is a deficient number, since it is larger than the sum of its proper divisors (384871).

1997849 is a wasteful number, since it uses less digits than its factorization.

1997849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12439.

The product of its digits is 163296, while the sum is 47.

The square root of 1997849 is about 1413.4528644422. The cubic root of 1997849 is about 125.9469206174.

The spelling of 1997849 in words is "one million, nine hundred ninety-seven thousand, eight hundred forty-nine".