1989737 has 4 divisors (see below), whose sum is σ = 2094480. Its totient is φ = 1884996.

The previous prime is 1989721. The next prime is 1989769. The reversal of 1989737 is 7379891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1989737 - 2⁴ = 1989721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52343 + ... + 52380.

It is an arithmetic number, because the mean of its divisors is an integer number (523620).

2^1989737 is an apocalyptic number.

It is an amenable number.

1989737 is a deficient number, since it is larger than the sum of its proper divisors (104743).

1989737 is a wasteful number, since it uses less digits than its factorization.

1989737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104742.

The product of its digits is 95256, while the sum is 44.

The square root of 1989737 is about 1410.5803770080. The cubic root of 1989737 is about 125.7762258104.

The spelling of 1989737 in words is "one million, nine hundred eighty-nine thousand, seven hundred thirty-seven".