75068809 has 2 divisors, whose sum is σ = 75068810. Its totient is φ = 75068808.

The previous prime is 75068801. The next prime is 75068837. The reversal of 75068809 is 90886057.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73960000 + 1108809 = 8600^2 + 1053^2 .

It is a cyclic number.

It is not a de Polignac number, because 75068809 - 2³ = 75068801 is a prime.

It is not a weakly prime, because it can be changed into another prime (75068801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37534404 + 37534405.

It is an arithmetic number, because the mean of its divisors is an integer number (37534405).

Almost surely, 2^75068809 is an apocalyptic number.

It is an amenable number.

75068809 is a deficient number, since it is larger than the sum of its proper divisors (1).

75068809 is an equidigital number, since it uses as much as digits as its factorization.

75068809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 75068809 is about 8664.2258165401. The cubic root of 75068809 is about 421.8452615819.

The spelling of 75068809 in words is "seventy-five million, sixty-eight thousand, eight hundred nine".