1988597 has 16 divisors (see below), whose sum is σ = 2304960. Its totient is φ = 1700352.

The previous prime is 1988587. The next prime is 1988599. The reversal of 1988597 is 7958891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1988597 - 2⁶ = 1988533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988599) 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, 20453 + ... + 20549.

It is an arithmetic number, because the mean of its divisors is an integer number (144060).

2^1988597 is an apocalyptic number.

It is an amenable number.

1988597 is a deficient number, since it is larger than the sum of its proper divisors (316363).

1988597 is a wasteful number, since it uses less digits than its factorization.

1988597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212.

The product of its digits is 181440, while the sum is 47.

The square root of 1988597 is about 1410.1762301216. The cubic root of 1988597 is about 125.7522004761.

The spelling of 1988597 in words is "one million, nine hundred eighty-eight thousand, five hundred ninety-seven".