1993711823 has 2 divisors, whose sum is σ = 1993711824. Its totient is φ = 1993711822.

The previous prime is 1993711777. The next prime is 1993711849. The reversal of 1993711823 is 3281173991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1993711823 - 2¹⁴ = 1993695439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993711723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996855911 + 996855912.

It is an arithmetic number, because the mean of its divisors is an integer number (996855912).

Almost surely, 2^1993711823 is an apocalyptic number.

1993711823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993711823 is an equidigital number, since it uses as much as digits as its factorization.

1993711823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 1993711823 is about 44651.0002463551. Note that the first 3 decimals coincide. The cubic root of 1993711823 is about 1258.5992291904.

The spelling of 1993711823 in words is "one billion, nine hundred ninety-three million, seven hundred eleven thousand, eight hundred twenty-three".