1988937 has 12 divisors (see below), whose sum is σ = 2888704. Its totient is φ = 1318680.

The previous prime is 1988933. The next prime is 1988941. The reversal of 1988937 is 7398891.

It is an interprime number because it is at equal distance from previous prime (1988933) and next prime (1988941).

It is not a de Polignac number, because 1988937 - 2² = 1988933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1988892 and 1988901.

It is not an unprimeable number, because it can be changed into a prime (1988933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1512 + ... + 2502.

2^1988937 is an apocalyptic number.

It is an amenable number.

1988937 is a deficient number, since it is larger than the sum of its proper divisors (899767).

1988937 is a wasteful number, since it uses less digits than its factorization.

1988937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220 (or 1217 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1988937 is about 1410.2967772777. The cubic root of 1988937 is about 125.7593668873.

The spelling of 1988937 in words is "one million, nine hundred eighty-eight thousand, nine hundred thirty-seven".