1969943 has 4 divisors (see below), whose sum is σ = 2085840. Its totient is φ = 1854048.

The previous prime is 1969921. The next prime is 1969949. The reversal of 1969943 is 3499691.

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 1969943 - 2¹⁰ = 1968919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1969943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969949) 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, 57923 + ... + 57956.

It is an arithmetic number, because the mean of its divisors is an integer number (521460).

2^1969943 is an apocalyptic number.

1969943 is a deficient number, since it is larger than the sum of its proper divisors (115897).

1969943 is a wasteful number, since it uses less digits than its factorization.

1969943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115896.

The product of its digits is 52488, while the sum is 41.

The square root of 1969943 is about 1403.5465792057. The cubic root of 1969943 is about 125.3577590906.

The spelling of 1969943 in words is "one million, nine hundred sixty-nine thousand, nine hundred forty-three".