285540149 has 2 divisors, whose sum is σ = 285540150. Its totient is φ = 285540148.

The previous prime is 285540103. The next prime is 285540191. The reversal of 285540149 is 941045582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144168049 + 141372100 = 12007^2 + 11890^2 .

It is a cyclic number.

It is not a de Polignac number, because 285540149 - 2⁸ = 285539893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285530149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142770074 + 142770075.

It is an arithmetic number, because the mean of its divisors is an integer number (142770075).

Almost surely, 2^285540149 is an apocalyptic number.

It is an amenable number.

285540149 is a deficient number, since it is larger than the sum of its proper divisors (1).

285540149 is an equidigital number, since it uses as much as digits as its factorization.

285540149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 285540149 is about 16897.9332759956. The cubic root of 285540149 is about 658.4999211103.

The spelling of 285540149 in words is "two hundred eighty-five million, five hundred forty thousand, one hundred forty-nine".