11137643 has 4 divisors (see below), whose sum is σ = 12150168. Its totient is φ = 10125120.

The previous prime is 11137631. The next prime is 11137661. The reversal of 11137643 is 34673111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34673111 = 11 ⋅3152101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11137643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11137603) 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, 506246 + ... + 506267.

It is an arithmetic number, because the mean of its divisors is an integer number (3037542).

Almost surely, 2^11137643 is an apocalyptic number.

11137643 is a deficient number, since it is larger than the sum of its proper divisors (1012525).

11137643 is a wasteful number, since it uses less digits than its factorization.

11137643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012524.

The product of its digits is 1512, while the sum is 26.

The square root of 11137643 is about 3337.3107436977. The cubic root of 11137643 is about 223.3217887154.

The spelling of 11137643 in words is "eleven million, one hundred thirty-seven thousand, six hundred forty-three".