1988471 has 2 divisors, whose sum is σ = 1988472. Its totient is φ = 1988470.

The previous prime is 1988453. The next prime is 1988513. The reversal of 1988471 is 1748891.

It is a weak prime.

It is an emirp because it is prime and its reverse (1748891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1988471 - 2¹⁸ = 1726327 is a prime.

It is a super-3 number, since 3×1988471³ = 23587343923908633333, which contains 333 as substring.

It is a Sophie Germain 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 (1988411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994235 + 994236.

It is an arithmetic number, because the mean of its divisors is an integer number (994236).

2^1988471 is an apocalyptic number.

1988471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988471 is an equidigital number, since it uses as much as digits as its factorization.

1988471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The square root of 1988471 is about 1410.1315541466. The cubic root of 1988471 is about 125.7495444810.

The spelling of 1988471 in words is "one million, nine hundred eighty-eight thousand, four hundred seventy-one".