1988599 has 2 divisors, whose sum is σ = 1988600. Its totient is φ = 1988598.

The previous prime is 1988587. The next prime is 1988611. The reversal of 1988599 is 9958891.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1988587) and next prime (1988611).

It is a cyclic number.

It is not a de Polignac number, because 1988599 - 2⁷ = 1988471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994299 + 994300.

It is an arithmetic number, because the mean of its divisors is an integer number (994300).

2^1988599 is an apocalyptic number.

1988599 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988599 is an equidigital number, since it uses as much as digits as its factorization.

1988599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 49.

The square root of 1988599 is about 1410.1769392527. The cubic root of 1988599 is about 125.7522426338.

The spelling of 1988599 in words is "one million, nine hundred eighty-eight thousand, five hundred ninety-nine".