75657689 has 2 divisors, whose sum is σ = 75657690. Its totient is φ = 75657688.

The previous prime is 75657679. The next prime is 75657691. The reversal of 75657689 is 98675657.

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., 52809289 + 22848400 = 7267^2 + 4780^2 .

It is a cyclic number.

It is not a de Polignac number, because 75657689 - 2²⁰ = 74609113 is a prime.

It is a super-3 number, since 3×75657689³ (a number of 25 digits) contains 333 as substring.

Together with 75657691, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75657689.

It is not a weakly prime, because it can be changed into another prime (75657619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37828844 + 37828845.

It is an arithmetic number, because the mean of its divisors is an integer number (37828845).

Almost surely, 2^75657689 is an apocalyptic number.

It is an amenable number.

75657689 is a deficient number, since it is larger than the sum of its proper divisors (1).

75657689 is an equidigital number, since it uses as much as digits as its factorization.

75657689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 53.

The square root of 75657689 is about 8698.1428477578. The cubic root of 75657689 is about 422.9454499159.

The spelling of 75657689 in words is "seventy-five million, six hundred fifty-seven thousand, six hundred eighty-nine".