134673521 has 2 divisors, whose sum is σ = 134673522. Its totient is φ = 134673520.

The previous prime is 134673503. The next prime is 134673523. The reversal of 134673521 is 125376431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93392896 + 41280625 = 9664^2 + 6425^2 .

It is a cyclic number.

It is not a de Polignac number, because 134673521 - 2⁶ = 134673457 is a prime.

Together with 134673523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (134673523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67336760 + 67336761.

It is an arithmetic number, because the mean of its divisors is an integer number (67336761).

Almost surely, 2^134673521 is an apocalyptic number.

It is an amenable number.

134673521 is a deficient number, since it is larger than the sum of its proper divisors (1).

134673521 is an equidigital number, since it uses as much as digits as its factorization.

134673521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 134673521 is about 11604.8921149660. The cubic root of 134673521 is about 512.5789159461.

The spelling of 134673521 in words is "one hundred thirty-four million, six hundred seventy-three thousand, five hundred twenty-one".