75380009 has 2 divisors, whose sum is σ = 75380010. Its totient is φ = 75380008.

The previous prime is 75379999. The next prime is 75380027. The reversal of 75380009 is 90008357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50410000 + 24970009 = 7100^2 + 4997^2 .

It is an emirp because it is prime and its reverse (90008357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75380009 - 2⁸ = 75379753 is a prime.

It is not a weakly prime, because it can be changed into another prime (75380059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37690004 + 37690005.

It is an arithmetic number, because the mean of its divisors is an integer number (37690005).

Almost surely, 2^75380009 is an apocalyptic number.

It is an amenable number.

75380009 is a deficient number, since it is larger than the sum of its proper divisors (1).

75380009 is an equidigital number, since it uses as much as digits as its factorization.

75380009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 75380009 is about 8682.1661467631. The cubic root of 75380009 is about 422.4273819850.

The spelling of 75380009 in words is "seventy-five million, three hundred eighty thousand, nine".