75145009 has 2 divisors, whose sum is σ = 75145010. Its totient is φ = 75145008.

The previous prime is 75144997. The next prime is 75145033. The reversal of 75145009 is 90054157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65658609 + 9486400 = 8103^2 + 3080^2 .

It is a cyclic number.

It is not a de Polignac number, because 75145009 - 2⁵ = 75144977 is a prime.

It is a super-2 number, since 2×75145009² = 11293544755220162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75145079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37572504 + 37572505.

It is an arithmetic number, because the mean of its divisors is an integer number (37572505).

Almost surely, 2^75145009 is an apocalyptic number.

It is an amenable number.

75145009 is a deficient number, since it is larger than the sum of its proper divisors (1).

75145009 is an equidigital number, since it uses as much as digits as its factorization.

75145009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 75145009 is about 8668.6220935048. The cubic root of 75145009 is about 421.9879472910.

The spelling of 75145009 in words is "seventy-five million, one hundred forty-five thousand, nine".