1940006993 has 2 divisors, whose sum is σ = 1940006994. Its totient is φ = 1940006992.

The previous prime is 1940006983. The next prime is 1940007019. The reversal of 1940006993 is 3996000491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1938024529 + 1982464 = 44023^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940006993 - 2²² = 1935812689 is a prime.

It is a Sophie Germain prime.

1940006993 is a modest number, since divided by 6993 gives 1940 as remainder.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1940006993.

It is not a weakly prime, because it can be changed into another prime (1940006923) 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 as a sum of consecutive naturals, namely, 970003496 + 970003497.

It is an arithmetic number, because the mean of its divisors is an integer number (970003497).

Almost surely, 2^1940006993 is an apocalyptic number.

It is an amenable number.

1940006993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940006993 is an equidigital number, since it uses as much as digits as its factorization.

1940006993 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1940006993 is about 44045.5104749621. The cubic root of 1940006993 is about 1247.1952030384.

The spelling of 1940006993 in words is "one billion, nine hundred forty million, six thousand, nine hundred ninety-three".