1933989 has 8 divisors (see below), whose sum is σ = 2614272. Its totient is φ = 1271520.

The previous prime is 1933979. The next prime is 1933993. The reversal of 1933989 is 9893391.

It is a happy number.

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

It is not a de Polignac number, because 1933989 - 2⁴ = 1933973 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1933989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1933979) 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, 4197 + ... + 4634.

It is an arithmetic number, because the mean of its divisors is an integer number (326784).

2^1933989 is an apocalyptic number.

It is an amenable number.

1933989 is a deficient number, since it is larger than the sum of its proper divisors (680283).

1933989 is an equidigital number, since it uses as much as digits as its factorization.

1933989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8907.

The product of its digits is 52488, while the sum is 42.

The square root of 1933989 is about 1390.6793303994. The cubic root of 1933989 is about 124.5904247842.

The spelling of 1933989 in words is "one million, nine hundred thirty-three thousand, nine hundred eighty-nine".