134721563 has 2 divisors, whose sum is σ = 134721564. Its totient is φ = 134721562.

The previous prime is 134721547. The next prime is 134721569. The reversal of 134721563 is 365127431.

It is a strong prime.

It is an emirp because it is prime and its reverse (365127431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134721563 - 2⁴ = 134721547 is a prime.

It is not a weakly prime, because it can be changed into another prime (134721569) 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, 67360781 + 67360782.

It is an arithmetic number, because the mean of its divisors is an integer number (67360782).

Almost surely, 2^134721563 is an apocalyptic number.

134721563 is a deficient number, since it is larger than the sum of its proper divisors (1).

134721563 is an equidigital number, since it uses as much as digits as its factorization.

134721563 is an odious number, because the sum of its binary digits is odd.

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

The square root of 134721563 is about 11606.9618333137. The cubic root of 134721563 is about 512.6398593507.

Adding to 134721563 its reverse (365127431), we get a palindrome (499848994).

The spelling of 134721563 in words is "one hundred thirty-four million, seven hundred twenty-one thousand, five hundred sixty-three".