1943971 has 4 divisors (see below), whose sum is σ = 1949832. Its totient is φ = 1938112.

The previous prime is 1943959. The next prime is 1943993. The reversal of 1943971 is 1793491.

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 1943971 - 2¹⁹ = 1419683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1943911) 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, 2401 + ... + 3106.

It is an arithmetic number, because the mean of its divisors is an integer number (487458).

2^1943971 is an apocalyptic number.

1943971 is a deficient number, since it is larger than the sum of its proper divisors (5861).

1943971 is an equidigital number, since it uses as much as digits as its factorization.

1943971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5860.

The product of its digits is 6804, while the sum is 34.

The square root of 1943971 is about 1394.2636049184. The cubic root of 1943971 is about 124.8044087789.

It can be divided in two parts, 1943 and 971, that multiplied together give a triangular number (1886653 = T₁₉₄₂).

The spelling of 1943971 in words is "one million, nine hundred forty-three thousand, nine hundred seventy-one".