1944972693 has 6 divisors (see below), whose sum is σ = 2809405014. Its totient is φ = 1296648456.

The previous prime is 1944972629. The next prime is 1944972707. The reversal of 1944972693 is 3962794491.

1944972693 is a `hidden beast` number, since 1 + 94 + 497 + 2 + 69 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1755442404 + 189530289 = 41898^2 + 13767^2 .

It is not a de Polignac number, because 1944972693 - 2⁶ = 1944972629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944972593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108054030 + ... + 108054047.

It is an arithmetic number, because the mean of its divisors is an integer number (468234169).

Almost surely, 2^1944972693 is an apocalyptic number.

It is an amenable number.

1944972693 is a deficient number, since it is larger than the sum of its proper divisors (864432321).

1944972693 is a wasteful number, since it uses less digits than its factorization.

1944972693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216108083 (or 216108080 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 1944972693 is about 44101.8445532610. The cubic root of 1944972693 is about 1248.2584158079.

The spelling of 1944972693 in words is "one billion, nine hundred forty-four million, nine hundred seventy-two thousand, six hundred ninety-three".