1989519 has 16 divisors (see below), whose sum is σ = 3052800. Its totient is φ = 1128960.

The previous prime is 1989517. The next prime is 1989551. The reversal of 1989519 is 9159891.

It is not a de Polignac number, because 1989519 - 2¹ = 1989517 is a prime.

It is a super-2 number, since 2×1989519² = 7916371702722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4207 + ... + 4655.

It is an arithmetic number, because the mean of its divisors is an integer number (190800).

2^1989519 is an apocalyptic number.

1989519 is a deficient number, since it is larger than the sum of its proper divisors (1063281).

1989519 is a wasteful number, since it uses less digits than its factorization.

1989519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670.

The product of its digits is 29160, while the sum is 42.

The square root of 1989519 is about 1410.5031017336. The cubic root of 1989519 is about 125.7716322019.

The spelling of 1989519 in words is "one million, nine hundred eighty-nine thousand, five hundred nineteen".