1906943 has 4 divisors (see below), whose sum is σ = 1958520. Its totient is φ = 1855368.

The previous prime is 1906909. The next prime is 1906963. The reversal of 1906943 is 3496091.

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 1906943 - 2¹² = 1902847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25733 + ... + 25806.

It is an arithmetic number, because the mean of its divisors is an integer number (489630).

2^1906943 is an apocalyptic number.

1906943 is a deficient number, since it is larger than the sum of its proper divisors (51577).

1906943 is an equidigital number, since it uses as much as digits as its factorization.

1906943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51576.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1906943 is about 1380.9210694316. The cubic root of 1906943 is about 124.0069151537.

The spelling of 1906943 in words is "one million, nine hundred six thousand, nine hundred forty-three".