1939138 has 4 divisors (see below), whose sum is σ = 2908710. Its totient is φ = 969568.

The previous prime is 1939123. The next prime is 1939141. The reversal of 1939138 is 8319391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1671849 + 267289 = 1293^2 + 517^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 484783 + ... + 484786.

2^1939138 is an apocalyptic number.

1939138 is a deficient number, since it is larger than the sum of its proper divisors (969572).

1939138 is an equidigital number, since it uses as much as digits as its factorization.

1939138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969571.

The product of its digits is 5832, while the sum is 34.

The square root of 1939138 is about 1392.5293533711. The cubic root of 1939138 is about 124.7008955297.

The spelling of 1939138 in words is "one million, nine hundred thirty-nine thousand, one hundred thirty-eight".