75087381709 has 2 divisors, whose sum is σ = 75087381710. Its totient is φ = 75087381708.

The previous prime is 75087381661. The next prime is 75087381713. The reversal of 75087381709 is 90718378057.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49662122500 + 25425259209 = 222850^2 + 159453^2 .

It is a cyclic number.

It is not a de Polignac number, because 75087381709 - 2⁷ = 75087381581 is a prime.

It is a super-2 number, since 2×75087381709² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75087381709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75087361709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37543690854 + 37543690855.

It is an arithmetic number, because the mean of its divisors is an integer number (37543690855).

Almost surely, 2^75087381709 is an apocalyptic number.

It is an amenable number.

75087381709 is a deficient number, since it is larger than the sum of its proper divisors (1).

75087381709 is an equidigital number, since it uses as much as digits as its factorization.

75087381709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 75087381709 in words is "seventy-five billion, eighty-seven million, three hundred eighty-one thousand, seven hundred nine".