755142209 has 2 divisors, whose sum is σ = 755142210. Its totient is φ = 755142208.

The previous prime is 755142197. The next prime is 755142247. The reversal of 755142209 is 902241557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731161600 + 23980609 = 27040^2 + 4897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-755142209 is a prime.

It is not a weakly prime, because it can be changed into another prime (755112209) 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, 377571104 + 377571105.

It is an arithmetic number, because the mean of its divisors is an integer number (377571105).

Almost surely, 2^755142209 is an apocalyptic number.

It is an amenable number.

755142209 is a deficient number, since it is larger than the sum of its proper divisors (1).

755142209 is an equidigital number, since it uses as much as digits as its factorization.

755142209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 755142209 is about 27479.8509639336. The cubic root of 755142209 is about 910.6320163682.

The spelling of 755142209 in words is "seven hundred fifty-five million, one hundred forty-two thousand, two hundred nine".