1989351 has 36 divisors (see below), whose sum is σ = 3610152. Its totient is φ = 1046304.

The previous prime is 1989341. The next prime is 1989353. The reversal of 1989351 is 1539891.

It is a happy number.

It is not a de Polignac number, because 1989351 - 2⁹ = 1988839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989353) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5560 + ... + 5906.

It is an arithmetic number, because the mean of its divisors is an integer number (100282).

2^1989351 is an apocalyptic number.

1989351 is a deficient number, since it is larger than the sum of its proper divisors (1620801).

1989351 is a wasteful number, since it uses less digits than its factorization.

1989351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 370 counting only the distinct ones).

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

The square root of 1989351 is about 1410.4435472574. The cubic root of 1989351 is about 125.7680919443.

The spelling of 1989351 in words is "one million, nine hundred eighty-nine thousand, three hundred fifty-one".