1399183993 has 2 divisors, whose sum is σ = 1399183994. Its totient is φ = 1399183992.

The previous prime is 1399183957. The next prime is 1399184011. The reversal of 1399183993 is 3993819931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1324741609 + 74442384 = 36397^2 + 8628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1399183993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399183913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699591996 + 699591997.

It is an arithmetic number, because the mean of its divisors is an integer number (699591997).

Almost surely, 2^1399183993 is an apocalyptic number.

It is an amenable number.

1399183993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399183993 is an equidigital number, since it uses as much as digits as its factorization.

1399183993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 55.

The square root of 1399183993 is about 37405.6679261312. The cubic root of 1399183993 is about 1118.4715526953.

The spelling of 1399183993 in words is "one billion, three hundred ninety-nine million, one hundred eighty-three thousand, nine hundred ninety-three".