1988011 has 2 divisors, whose sum is σ = 1988012. Its totient is φ = 1988010.

The previous prime is 1987991. The next prime is 1988023. The reversal of 1988011 is 1108891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1988011 - 2⁷ = 1987883 is a prime.

It is a super-2 number, since 2×1988011² = 7904375472242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1988411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994005 + 994006.

It is an arithmetic number, because the mean of its divisors is an integer number (994006).

2^1988011 is an apocalyptic number.

1988011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988011 is an equidigital number, since it uses as much as digits as its factorization.

1988011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1988011 is about 1409.9684393631. The cubic root of 1988011 is about 125.7398470381.

It can be divided in two parts, 19880 and 11, that added together give a palindrome (19891).

The spelling of 1988011 in words is "one million, nine hundred eighty-eight thousand, eleven".