1993383493 has 4 divisors (see below), whose sum is σ = 1993536160. Its totient is φ = 1993230828.

The previous prime is 1993383451. The next prime is 1993383529. The reversal of 1993383493 is 3943833991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3943833991 = 971 ⋅4061621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1993383493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1993383493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993383443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54705 + ... + 83542.

It is an arithmetic number, because the mean of its divisors is an integer number (498384040).

Almost surely, 2^1993383493 is an apocalyptic number.

It is an amenable number.

1993383493 is a deficient number, since it is larger than the sum of its proper divisors (152667).

1993383493 is a wasteful number, since it uses less digits than its factorization.

1993383493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152666.

The product of its digits is 1889568, while the sum is 52.

The square root of 1993383493 is about 44647.3234696101. The cubic root of 1993383493 is about 1258.5301355253.

The spelling of 1993383493 in words is "one billion, nine hundred ninety-three million, three hundred eighty-three thousand, four hundred ninety-three".