1988237 has 2 divisors, whose sum is σ = 1988238. Its totient is φ = 1988236.

The previous prime is 1988227. The next prime is 1988243. The reversal of 1988237 is 7328891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1378276 + 609961 = 1174^2 + 781^2 .

It is an emirp because it is prime and its reverse (7328891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1988237 - 2⁴ = 1988221 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1988237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994118 + 994119.

It is an arithmetic number, because the mean of its divisors is an integer number (994119).

2^1988237 is an apocalyptic number.

It is an amenable number.

1988237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988237 is an equidigital number, since it uses as much as digits as its factorization.

1988237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 1988237 is about 1410.0485807234. The cubic root of 1988237 is about 125.7446116209.

The spelling of 1988237 in words is "one million, nine hundred eighty-eight thousand, two hundred thirty-seven".