1938987 has 6 divisors (see below), whose sum is σ = 2800772. Its totient is φ = 1292652.

The previous prime is 1938983. The next prime is 1938997. The reversal of 1938987 is 7898391.

It is not a de Polignac number, because 1938987 - 2² = 1938983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107713 + ... + 107730.

2^1938987 is an apocalyptic number.

1938987 is a deficient number, since it is larger than the sum of its proper divisors (861785).

1938987 is a wasteful number, since it uses less digits than its factorization.

1938987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215449 (or 215446 counting only the distinct ones).

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

The square root of 1938987 is about 1392.4751344279. The cubic root of 1938987 is about 124.6976586405.

It can be divided in two parts, 193 and 8987, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 1938987 in words is "one million, nine hundred thirty-eight thousand, nine hundred eighty-seven".