1988113 has 2 divisors, whose sum is σ = 1988114. Its totient is φ = 1988112.

The previous prime is 1988101. The next prime is 1988137. The reversal of 1988113 is 3118891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1979649 + 8464 = 1407^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1988113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1988183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994056 + 994057.

It is an arithmetic number, because the mean of its divisors is an integer number (994057).

2^1988113 is an apocalyptic number.

It is an amenable number.

1988113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988113 is an equidigital number, since it uses as much as digits as its factorization.

1988113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 31.

The square root of 1988113 is about 1410.0046099215. The cubic root of 1988113 is about 125.7419974697.

The spelling of 1988113 in words is "one million, nine hundred eighty-eight thousand, one hundred thirteen".