75006409 has 2 divisors, whose sum is σ = 75006410. Its totient is φ = 75006408.

The previous prime is 75006367. The next prime is 75006413. The reversal of 75006409 is 90460057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58982400 + 16024009 = 7680^2 + 4003^2 .

It is an emirp because it is prime and its reverse (90460057) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75006409 is a prime.

It is a super-2 number, since 2×75006409² = 11251922782150562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75006469) 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, 37503204 + 37503205.

It is an arithmetic number, because the mean of its divisors is an integer number (37503205).

Almost surely, 2^75006409 is an apocalyptic number.

It is an amenable number.

75006409 is a deficient number, since it is larger than the sum of its proper divisors (1).

75006409 is an equidigital number, since it uses as much as digits as its factorization.

75006409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 75006409 is about 8660.6240537273. The cubic root of 75006409 is about 421.7283446642.

The spelling of 75006409 in words is "seventy-five million, six thousand, four hundred nine".