1797987 has 8 divisors (see below), whose sum is σ = 2403520. Its totient is φ = 1195560.

The previous prime is 1797967. The next prime is 1798001. The reversal of 1797987 is 7897971.

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

It is not a de Polignac number, because 1797987 - 2¹⁸ = 1535843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1797947) 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, 1812 + ... + 2622.

It is an arithmetic number, because the mean of its divisors is an integer number (300440).

2^1797987 is an apocalyptic number.

1797987 is a deficient number, since it is larger than the sum of its proper divisors (605533).

1797987 is an equidigital number, since it uses as much as digits as its factorization.

1797987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553.

The product of its digits is 222264, while the sum is 48.

The square root of 1797987 is about 1340.8903758324. The cubic root of 1797987 is about 121.5986768020.

The spelling of 1797987 in words is "one million, seven hundred ninety-seven thousand, nine hundred eighty-seven".