75303257 has 2 divisors, whose sum is σ = 75303258. Its totient is φ = 75303256.

The previous prime is 75303211. The next prime is 75303287. The reversal of 75303257 is 75230357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65593801 + 9709456 = 8099^2 + 3116^2 .

It is a cyclic number.

It is not a de Polignac number, because 75303257 - 2⁸ = 75303001 is a prime.

It is not a weakly prime, because it can be changed into another prime (75303287) 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, 37651628 + 37651629.

It is an arithmetic number, because the mean of its divisors is an integer number (37651629).

Almost surely, 2^75303257 is an apocalyptic number.

It is an amenable number.

75303257 is a deficient number, since it is larger than the sum of its proper divisors (1).

75303257 is an equidigital number, since it uses as much as digits as its factorization.

75303257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22050, while the sum is 32.

The square root of 75303257 is about 8677.7449259586. The cubic root of 75303257 is about 422.2839613037.

Subtracting from 75303257 its reverse (75230357), we obtain a square (72900 = 270²).

The spelling of 75303257 in words is "seventy-five million, three hundred three thousand, two hundred fifty-seven".