1993711801 has 3 divisors (see below), whose sum is σ = 1993756453. Its totient is φ = 1993667150.

The previous prime is 1993711777. The next prime is 1993711823. The reversal of 1993711801 is 1081173991.

The square root of 1993711801 is 44651.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1993711801 - 2⁷ = 1993711673 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1993711871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22326 + ... + 66976.

Almost surely, 2^1993711801 is an apocalyptic number.

1993711801 is the 44651-st square number.

1993711801 is the 22326-th centered octagonal number.

It is an amenable number.

1993711801 is a deficient number, since it is larger than the sum of its proper divisors (44652).

1993711801 is an frugal number, since it uses more digits than its factorization.

1993711801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89302 (or 44651 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 40.

The cubic root of 1993711801 is about 1258.5992245610.

The spelling of 1993711801 in words is "one billion, nine hundred ninety-three million, seven hundred eleven thousand, eight hundred one".