13138457 has 2 divisors, whose sum is σ = 13138458. Its totient is φ = 13138456.

The previous prime is 13138453. The next prime is 13138471. The reversal of 13138457 is 75483131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 63001 = 3616^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 13138457 - 2² = 13138453 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13138453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6569228 + 6569229.

It is an arithmetic number, because the mean of its divisors is an integer number (6569229).

Almost surely, 2^13138457 is an apocalyptic number.

It is an amenable number.

13138457 is a deficient number, since it is larger than the sum of its proper divisors (1).

13138457 is an equidigital number, since it uses as much as digits as its factorization.

13138457 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13138457 is about 3624.7009531822. The cubic root of 13138457 is about 235.9652886323.

The spelling of 13138457 in words is "thirteen million, one hundred thirty-eight thousand, four hundred fifty-seven".