10511993 has 4 divisors (see below), whose sum is σ = 10518948. Its totient is φ = 10505040.

The previous prime is 10511983. The next prime is 10512011. The reversal of 10511993 is 39911501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39911501 = 7 ⋅5701643.

It can be written as a sum of positive squares in 2 ways, for example, as 4376464 + 6135529 = 2092^2 + 2477^2 .

It is a cyclic number.

It is not a de Polignac number, because 10511993 - 2¹² = 10507897 is a prime.

It is a super-2 number, since 2×10511993² = 221003993664098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10511923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146 + ... + 4587.

It is an arithmetic number, because the mean of its divisors is an integer number (2629737).

Almost surely, 2^10511993 is an apocalyptic number.

It is an amenable number.

10511993 is a deficient number, since it is larger than the sum of its proper divisors (6955).

10511993 is an equidigital number, since it uses as much as digits as its factorization.

10511993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6954.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 10511993 is about 3242.2203811586. The cubic root of 10511993 is about 219.0592960236.

The spelling of 10511993 in words is "ten million, five hundred eleven thousand, nine hundred ninety-three".