1994712593 has 2 divisors, whose sum is σ = 1994712594. Its totient is φ = 1994712592.

The previous prime is 1994712563. The next prime is 1994712613. The reversal of 1994712593 is 3952174991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1332834064 + 661878529 = 36508^2 + 25727^2 .

It is an emirp because it is prime and its reverse (3952174991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1994712593 - 2¹⁰ = 1994711569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1994712563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997356296 + 997356297.

It is an arithmetic number, because the mean of its divisors is an integer number (997356297).

Almost surely, 2^1994712593 is an apocalyptic number.

It is an amenable number.

1994712593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994712593 is an equidigital number, since it uses as much as digits as its factorization.

1994712593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 50.

The square root of 1994712593 is about 44662.2054202432. The cubic root of 1994712593 is about 1258.8097841366.

The spelling of 1994712593 in words is "one billion, nine hundred ninety-four million, seven hundred twelve thousand, five hundred ninety-three".