13243787 has 4 divisors (see below), whose sum is σ = 13253136. Its totient is φ = 13234440.

The previous prime is 13243777. The next prime is 13243793. The reversal of 13243787 is 78734231.

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: 78734231 = 397 ⋅198323.

It is a cyclic number.

It is not a de Polignac number, because 13243787 - 2⁶ = 13243723 is a prime.

It is a super-3 number, since 3×13243787³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13243717) 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, 2063 + ... + 5544.

It is an arithmetic number, because the mean of its divisors is an integer number (3313284).

Almost surely, 2^13243787 is an apocalyptic number.

13243787 is a deficient number, since it is larger than the sum of its proper divisors (9349).

13243787 is an equidigital number, since it uses as much as digits as its factorization.

13243787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9348.

The product of its digits is 28224, while the sum is 35.

The square root of 13243787 is about 3639.2014233895. The cubic root of 13243787 is about 236.5941828766.

The spelling of 13243787 in words is "thirteen million, two hundred forty-three thousand, seven hundred eighty-seven".