75305129 has 2 divisors, whose sum is σ = 75305130. Its totient is φ = 75305128.

The previous prime is 75305123. The next prime is 75305173. The reversal of 75305129 is 92150357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52998400 + 22306729 = 7280^2 + 4723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75305129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75305095 and 75305104.

It is not a weakly prime, because it can be changed into another prime (75305123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37652564 + 37652565.

It is an arithmetic number, because the mean of its divisors is an integer number (37652565).

Almost surely, 2^75305129 is an apocalyptic number.

It is an amenable number.

75305129 is a deficient number, since it is larger than the sum of its proper divisors (1).

75305129 is an equidigital number, since it uses as much as digits as its factorization.

75305129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 75305129 is about 8677.8527874123. The cubic root of 75305129 is about 422.2874605283.

The spelling of 75305129 in words is "seventy-five million, three hundred five thousand, one hundred twenty-nine".