1989695 has 4 divisors (see below), whose sum is σ = 2387640. Its totient is φ = 1591752.

The previous prime is 1989683. The next prime is 1989721. The reversal of 1989695 is 5969891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5969891 = 631 ⋅9461.

It is a cyclic number.

It is not a de Polignac number, because 1989695 - 2⁴ = 1989679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198965 + ... + 198974.

It is an arithmetic number, because the mean of its divisors is an integer number (596910).

2^1989695 is an apocalyptic number.

1989695 is a deficient number, since it is larger than the sum of its proper divisors (397945).

1989695 is an equidigital number, since it uses as much as digits as its factorization.

1989695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397944.

The product of its digits is 174960, while the sum is 47.

The square root of 1989695 is about 1410.5654894403. The cubic root of 1989695 is about 125.7753408293.

It can be divided in two parts, 19896 and 95, that added together give a palindrome (19991).

The spelling of 1989695 in words is "one million, nine hundred eighty-nine thousand, six hundred ninety-five".