134888521 has 2 divisors, whose sum is σ = 134888522. Its totient is φ = 134888520.

The previous prime is 134888513. The next prime is 134888527. The reversal of 134888521 is 125888431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103124025 + 31764496 = 10155^2 + 5636^2 .

It is an emirp because it is prime and its reverse (125888431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134888521 - 2³ = 134888513 is a prime.

It is not a weakly prime, because it can be changed into another prime (134888527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67444260 + 67444261.

It is an arithmetic number, because the mean of its divisors is an integer number (67444261).

Almost surely, 2^134888521 is an apocalyptic number.

It is an amenable number.

134888521 is a deficient number, since it is larger than the sum of its proper divisors (1).

134888521 is an equidigital number, since it uses as much as digits as its factorization.

134888521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 40.

The square root of 134888521 is about 11614.1517555093. The cubic root of 134888521 is about 512.8515403705.

The spelling of 134888521 in words is "one hundred thirty-four million, eight hundred eighty-eight thousand, five hundred twenty-one".