13438157 has 2 divisors, whose sum is σ = 13438158. Its totient is φ = 13438156.

The previous prime is 13438147. The next prime is 13438163. The reversal of 13438157 is 75183431.

13438157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10407076 + 3031081 = 3226^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 13438157 - 2⁸ = 13437901 is a prime.

It is equal to p₈₇₅₉₁₂ and since 13438157 and 875912 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13438147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6719078 + 6719079.

It is an arithmetic number, because the mean of its divisors is an integer number (6719079).

Almost surely, 2^13438157 is an apocalyptic number.

It is an amenable number.

13438157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13438157 is an equidigital number, since it uses as much as digits as its factorization.

13438157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 13438157 is about 3665.8091876147. The cubic root of 13438157 is about 237.7460099072.

The spelling of 13438157 in words is "thirteen million, four hundred thirty-eight thousand, one hundred fifty-seven".