13444157 has 2 divisors, whose sum is σ = 13444158. Its totient is φ = 13444156.

The previous prime is 13444147. The next prime is 13444231. The reversal of 13444157 is 75144431.

It is a happy number.

13444157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13060996 + 383161 = 3614^2 + 619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13444157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13444117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722078 + 6722079.

It is an arithmetic number, because the mean of its divisors is an integer number (6722079).

Almost surely, 2^13444157 is an apocalyptic number.

It is an amenable number.

13444157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13444157 is an equidigital number, since it uses as much as digits as its factorization.

13444157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 13444157 is about 3666.6274694875. The cubic root of 13444157 is about 237.7813883650.

Adding to 13444157 its reverse (75144431), we get a palindrome (88588588).

The spelling of 13444157 in words is "thirteen million, four hundred forty-four thousand, one hundred fifty-seven".