75780869 has 2 divisors, whose sum is σ = 75780870. Its totient is φ = 75780868.

The previous prime is 75780841. The next prime is 75780877. The reversal of 75780869 is 96808757.

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., 75777025 + 3844 = 8705^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 75780869 - 2⁸ = 75780613 is a prime.

It is a super-3 number, since 3×75780869³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75780269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37890434 + 37890435.

It is an arithmetic number, because the mean of its divisors is an integer number (37890435).

Almost surely, 2^75780869 is an apocalyptic number.

It is an amenable number.

75780869 is a deficient number, since it is larger than the sum of its proper divisors (1).

75780869 is an equidigital number, since it uses as much as digits as its factorization.

75780869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 75780869 is about 8705.2207898479. The cubic root of 75780869 is about 423.1748611520.

The spelling of 75780869 in words is "seventy-five million, seven hundred eighty thousand, eight hundred sixty-nine".