1943612393 has 12 divisors (see below), whose sum is σ = 2015720460. Its totient is φ = 1874005056.

The previous prime is 1943612381. The next prime is 1943612413. The reversal of 1943612393 is 3932163491.

It can be written as a sum of positive squares in 6 ways, for example, as 370062169 + 1573550224 = 19237^2 + 39668^2 .

It is not a de Polignac number, because 1943612393 - 2⁸ = 1943612137 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 1943612393.

It is not an unprimeable number, because it can be changed into a prime (1943612303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 938363 + ... + 940431.

It is an arithmetic number, because the mean of its divisors is an integer number (167976705).

Almost surely, 2^1943612393 is an apocalyptic number.

It is an amenable number.

1943612393 is a deficient number, since it is larger than the sum of its proper divisors (72108067).

1943612393 is a wasteful number, since it uses less digits than its factorization.

1943612393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244 (or 3215 counting only the distinct ones).

The product of its digits is 104976, while the sum is 41.

The square root of 1943612393 is about 44086.4195983298. The cubic root of 1943612393 is about 1247.9673402672.

The spelling of 1943612393 in words is "one billion, nine hundred forty-three million, six hundred twelve thousand, three hundred ninety-three".