13309157 has 4 divisors (see below), whose sum is σ = 13887840. Its totient is φ = 12730476.

The previous prime is 13309151. The next prime is 13309169. The reversal of 13309157 is 75190331.

13309157 is digitally balanced in base 2 and base 3, because in such bases 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13309157 - 2¹⁰ = 13308133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13309151) 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, 289307 + ... + 289352.

It is an arithmetic number, because the mean of its divisors is an integer number (3471960).

Almost surely, 2^13309157 is an apocalyptic number.

It is an amenable number.

13309157 is a deficient number, since it is larger than the sum of its proper divisors (578683).

13309157 is an equidigital number, since it uses as much as digits as its factorization.

13309157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578682.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 13309157 is about 3648.1717338963. The cubic root of 13309157 is about 236.9828125239.

Adding to 13309157 its reverse (75190331), we get a palindrome (88499488).

The spelling of 13309157 in words is "thirteen million, three hundred nine thousand, one hundred fifty-seven".