134649551 has 2 divisors, whose sum is σ = 134649552. Its totient is φ = 134649550.

The previous prime is 134649547. The next prime is 134649589. The reversal of 134649551 is 155946431.

It is an a-pointer prime, because the next prime (134649589) can be obtained adding 134649551 to its sum of digits (38).

It is a weak prime.

It is an emirp because it is prime and its reverse (155946431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134649551 - 2² = 134649547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134649511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67324775 + 67324776.

It is an arithmetic number, because the mean of its divisors is an integer number (67324776).

Almost surely, 2^134649551 is an apocalyptic number.

134649551 is a deficient number, since it is larger than the sum of its proper divisors (1).

134649551 is an equidigital number, since it uses as much as digits as its factorization.

134649551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 134649551 is about 11603.8593149004. The cubic root of 134649551 is about 512.5485035197.

The spelling of 134649551 in words is "one hundred thirty-four million, six hundred forty-nine thousand, five hundred fifty-one".