505154149 has 2 divisors, whose sum is σ = 505154150. Its totient is φ = 505154148.

The previous prime is 505154141. The next prime is 505154179. The reversal of 505154149 is 941451505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423124900 + 82029249 = 20570^2 + 9057^2 .

It is a cyclic number.

It is not a de Polignac number, because 505154149 - 2³ = 505154141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505154141) 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, 252577074 + 252577075.

It is an arithmetic number, because the mean of its divisors is an integer number (252577075).

Almost surely, 2^505154149 is an apocalyptic number.

It is an amenable number.

505154149 is a deficient number, since it is larger than the sum of its proper divisors (1).

505154149 is an equidigital number, since it uses as much as digits as its factorization.

505154149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 505154149 is about 22475.6345627882. The cubic root of 505154149 is about 796.4184420863.

The spelling of 505154149 in words is "five hundred five million, one hundred fifty-four thousand, one hundred forty-nine".