1987933 has 8 divisors (see below), whose sum is σ = 2062368. Its totient is φ = 1914864.

The previous prime is 1987919. The next prime is 1987939. The reversal of 1987933 is 3397891.

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 1987933 - 2⁵ = 1987901 is a prime.

It is a super-2 number, since 2×1987933² = 7903755224978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3291 + ... + 3847.

It is an arithmetic number, because the mean of its divisors is an integer number (257796).

2^1987933 is an apocalyptic number.

It is an amenable number.

1987933 is a deficient number, since it is larger than the sum of its proper divisors (74435).

1987933 is an equidigital number, since it uses as much as digits as its factorization.

1987933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its digits is 40824, while the sum is 40.

The square root of 1987933 is about 1409.9407788982. The cubic root of 1987933 is about 125.7382025408.

The spelling of 1987933 in words is "one million, nine hundred eighty-seven thousand, nine hundred thirty-three".