13028739 has 4 divisors (see below), whose sum is σ = 17371656. Its totient is φ = 8685824.

The previous prime is 13028731. The next prime is 13028761. The reversal of 13028739 is 93782031.

13028739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13028739 - 2³ = 13028731 is a prime.

It is a super-3 number, since 3×13028739³ (a number of 22 digits) contains 333 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13028731) 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, 2171454 + ... + 2171459.

It is an arithmetic number, because the mean of its divisors is an integer number (4342914).

Almost surely, 2^13028739 is an apocalyptic number.

13028739 is a deficient number, since it is larger than the sum of its proper divisors (4342917).

13028739 is an equidigital number, since it uses as much as digits as its factorization.

13028739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342916.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 13028739 is about 3609.5344575166. The cubic root of 13028739 is about 235.3066104972.

The spelling of 13028739 in words is "thirteen million, twenty-eight thousand, seven hundred thirty-nine".