148775729 has 2 divisors, whose sum is σ = 148775730. Its totient is φ = 148775728.

The previous prime is 148775699. The next prime is 148775741. The reversal of 148775729 is 927577841.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119399329 + 29376400 = 10927^2 + 5420^2 .

It is an emirp because it is prime and its reverse (927577841) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148775729 is a prime.

It is not a weakly prime, because it can be changed into another prime (148775749) 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, 74387864 + 74387865.

It is an arithmetic number, because the mean of its divisors is an integer number (74387865).

Almost surely, 2^148775729 is an apocalyptic number.

It is an amenable number.

148775729 is a deficient number, since it is larger than the sum of its proper divisors (1).

148775729 is an equidigital number, since it uses as much as digits as its factorization.

148775729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 50.

The square root of 148775729 is about 12197.3656582067. The cubic root of 148775729 is about 529.8797983015.

The spelling of 148775729 in words is "one hundred forty-eight million, seven hundred seventy-five thousand, seven hundred twenty-nine".