1943397 has 12 divisors (see below), whose sum is σ = 2825004. Its totient is φ = 1287360.

The previous prime is 1943393. The next prime is 1943411. The reversal of 1943397 is 7933491.

It can be written as a sum of positive squares in 2 ways, for example, as 370881 + 1572516 = 609^2 + 1254^2 .

It is not a de Polignac number, because 1943397 - 2² = 1943393 is a prime.

1943397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1943393) 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 11 ways as a sum of consecutive naturals, for example, 1033 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (235417).

2^1943397 is an apocalyptic number.

It is an amenable number.

1943397 is a deficient number, since it is larger than the sum of its proper divisors (881607).

1943397 is a wasteful number, since it uses less digits than its factorization.

1943397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1377 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 1943397 is about 1394.0577462932. The cubic root of 1943397 is about 124.7921238249.

The spelling of 1943397 in words is "one million, nine hundred forty-three thousand, three hundred ninety-seven".