13009657 has 4 divisors (see below), whose sum is σ = 13104756. Its totient is φ = 12914560.

The previous prime is 13009639. The next prime is 13009663. The reversal of 13009657 is 75690031.

13009657 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, and also an emirpimes, since its reverse is a distinct semiprime: 75690031 = 547 ⋅138373.

It can be written as a sum of positive squares in 2 ways, for example, as 10106041 + 2903616 = 3179^2 + 1704^2 .

It is a cyclic number.

It is not a de Polignac number, because 13009657 - 2²³ = 4621049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13009687) 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, 47344 + ... + 47617.

It is an arithmetic number, because the mean of its divisors is an integer number (3276189).

Almost surely, 2^13009657 is an apocalyptic number.

It is an amenable number.

13009657 is a deficient number, since it is larger than the sum of its proper divisors (95099).

13009657 is an equidigital number, since it uses as much as digits as its factorization.

13009657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95098.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 13009657 is about 3606.8902118030. The cubic root of 13009657 is about 235.1916770255.

Adding to 13009657 its reverse (75690031), we get a palindrome (88699688).

The spelling of 13009657 in words is "thirteen million, nine thousand, six hundred fifty-seven".