75399329 has 2 divisors, whose sum is σ = 75399330. Its totient is φ = 75399328.

The previous prime is 75399323. The next prime is 75399367. The reversal of 75399329 is 92399357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72709729 + 2689600 = 8527^2 + 1640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75399329 is a prime.

It is not a weakly prime, because it can be changed into another prime (75399323) 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, 37699664 + 37699665.

It is an arithmetic number, because the mean of its divisors is an integer number (37699665).

Almost surely, 2^75399329 is an apocalyptic number.

It is an amenable number.

75399329 is a deficient number, since it is larger than the sum of its proper divisors (1).

75399329 is an equidigital number, since it uses as much as digits as its factorization.

75399329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 47.

The square root of 75399329 is about 8683.2787010437. The cubic root of 75399329 is about 422.4634684752.

The spelling of 75399329 in words is "seventy-five million, three hundred ninety-nine thousand, three hundred twenty-nine".