1988837 has 2 divisors, whose sum is σ = 1988838. Its totient is φ = 1988836.

The previous prime is 1988807. The next prime is 1988839. The reversal of 1988837 is 7388891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 919681 = 1034^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 1988837 - 2¹⁸ = 1726693 is a prime.

It is a super-2 number, since 2×1988837² = 7910945225138, which contains 22 as substring.

Together with 1988839, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994418 + 994419.

It is an arithmetic number, because the mean of its divisors is an integer number (994419).

2^1988837 is an apocalyptic number.

It is an amenable number.

1988837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988837 is an equidigital number, since it uses as much as digits as its factorization.

1988837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 1988837 is about 1410.2613233015. The cubic root of 1988837 is about 125.7572592041.

The spelling of 1988837 in words is "one million, nine hundred eighty-eight thousand, eight hundred thirty-seven".