1989153 has 12 divisors (see below), whose sum is σ = 3042468. Its totient is φ = 1248000.

The previous prime is 1989151. The next prime is 1989161. The reversal of 1989153 is 3519891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 627264 + 1361889 = 792^2 + 1167^2 .

It is not a de Polignac number, because 1989153 - 2¹ = 1989151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1989151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6348 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (253539).

2^1989153 is an apocalyptic number.

It is an amenable number.

1989153 is a deficient number, since it is larger than the sum of its proper divisors (1053315).

1989153 is a wasteful number, since it uses less digits than its factorization.

1989153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13024 (or 13021 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1989153 is about 1410.3733548249. The cubic root of 1989153 is about 125.7639192420.

The spelling of 1989153 in words is "one million, nine hundred eighty-nine thousand, one hundred fifty-three".