1993428263 has 4 divisors (see below), whose sum is σ = 2098345560. Its totient is φ = 1888510968.

The previous prime is 1993428257. The next prime is 1993428277. The reversal of 1993428263 is 3628243991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3628243991 = 487 ⋅7450193.

It is a cyclic number.

It is not a de Polignac number, because 1993428263 - 2²⁰ = 1992379687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993428253) 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 3 ways as a sum of consecutive naturals, for example, 52458620 + ... + 52458657.

It is an arithmetic number, because the mean of its divisors is an integer number (524586390).

Almost surely, 2^1993428263 is an apocalyptic number.

1993428263 is a deficient number, since it is larger than the sum of its proper divisors (104917297).

1993428263 is a wasteful number, since it uses less digits than its factorization.

1993428263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104917296.

The product of its digits is 559872, while the sum is 47.

The square root of 1993428263 is about 44647.8248406347. The cubic root of 1993428263 is about 1258.5395573571.

The spelling of 1993428263 in words is "one billion, nine hundred ninety-three million, four hundred twenty-eight thousand, two hundred sixty-three".