1906939 has 4 divisors (see below), whose sum is σ = 1939320. Its totient is φ = 1874560.

The previous prime is 1906909. The next prime is 1906963. The reversal of 1906939 is 9396091.

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

It is a cyclic number.

It is not a de Polignac number, because 1906939 - 2⁷ = 1906811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1906898 and 1906907.

It is not an unprimeable number, because it can be changed into a prime (1906909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16102 + ... + 16219.

It is an arithmetic number, because the mean of its divisors is an integer number (484830).

2^1906939 is an apocalyptic number.

1906939 is a deficient number, since it is larger than the sum of its proper divisors (32381).

1906939 is an equidigital number, since it uses as much as digits as its factorization.

1906939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32380.

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

The square root of 1906939 is about 1380.9196211221. The cubic root of 1906939 is about 124.0068284481.

The spelling of 1906939 in words is "one million, nine hundred six thousand, nine hundred thirty-nine".