75075709 has 2 divisors, whose sum is σ = 75075710. Its totient is φ = 75075708.

The previous prime is 75075677. The next prime is 75075727. The reversal of 75075709 is 90757057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 35070084 = 6325^2 + 5922^2 .

It is a cyclic number.

It is not a de Polignac number, because 75075709 - 2⁵ = 75075677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75075739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37537854 + 37537855.

It is an arithmetic number, because the mean of its divisors is an integer number (37537855).

Almost surely, 2^75075709 is an apocalyptic number.

It is an amenable number.

75075709 is a deficient number, since it is larger than the sum of its proper divisors (1).

75075709 is an equidigital number, since it uses as much as digits as its factorization.

75075709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77175, while the sum is 40.

The square root of 75075709 is about 8664.6239964582. The cubic root of 75075709 is about 421.8581859161.

The spelling of 75075709 in words is "seventy-five million, seventy-five thousand, seven hundred nine".