75280129 has 2 divisors, whose sum is σ = 75280130. Its totient is φ = 75280128.

The previous prime is 75280111. The next prime is 75280169. The reversal of 75280129 is 92108257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 7711729 = 8220^2 + 2777^2 .

It is a cyclic number.

It is not a de Polignac number, because 75280129 - 2⁷ = 75280001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75280094 and 75280103.

It is not a weakly prime, because it can be changed into another prime (75280169) 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, 37640064 + 37640065.

It is an arithmetic number, because the mean of its divisors is an integer number (37640065).

Almost surely, 2^75280129 is an apocalyptic number.

It is an amenable number.

75280129 is a deficient number, since it is larger than the sum of its proper divisors (1).

75280129 is an equidigital number, since it uses as much as digits as its factorization.

75280129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 75280129 is about 8676.4122193450. The cubic root of 75280129 is about 422.2407246457.

The spelling of 75280129 in words is "seventy-five million, two hundred eighty thousand, one hundred twenty-nine".