1993043513 has 4 divisors (see below), whose sum is σ = 2097940560. Its totient is φ = 1888146468.

The previous prime is 1993043509. The next prime is 1993043557. The reversal of 1993043513 is 3153403991.

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: 3153403991 = 1223 ⋅2578417.

It is a cyclic number.

It is not a de Polignac number, because 1993043513 - 2² = 1993043509 is a prime.

It is a super-2 number, since 2×1993043513² = 7944444889422762338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1993043713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52448495 + ... + 52448532.

It is an arithmetic number, because the mean of its divisors is an integer number (524485140).

Almost surely, 2^1993043513 is an apocalyptic number.

It is an amenable number.

1993043513 is a deficient number, since it is larger than the sum of its proper divisors (104897047).

1993043513 is a wasteful number, since it uses less digits than its factorization.

1993043513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104897046.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 1993043513 is about 44643.5159121680. The cubic root of 1993043513 is about 1258.4585822417.

The spelling of 1993043513 in words is "one billion, nine hundred ninety-three million, forty-three thousand, five hundred thirteen".