1939906 has 8 divisors (see below), whose sum is σ = 2964924. Its totient is φ = 951600.

The previous prime is 1939901. The next prime is 1939909. The reversal of 1939906 is 6099391.

It can be written as a sum of positive squares in 2 ways, for example, as 1846881 + 93025 = 1359^2 + 305^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1939901) 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 3 ways as a sum of consecutive naturals, for example, 9045 + ... + 9256.

2^1939906 is an apocalyptic number.

1939906 is a deficient number, since it is larger than the sum of its proper divisors (1025018).

1939906 is a wasteful number, since it uses less digits than its factorization.

1939906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18356.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 1939906 is about 1392.8050832762. The cubic root of 1939906 is about 124.7173560475.

The spelling of 1939906 in words is "one million, nine hundred thirty-nine thousand, nine hundred six".