75685997 has 2 divisors, whose sum is σ = 75685998. Its totient is φ = 75685996.

The previous prime is 75685993. The next prime is 75685999. The reversal of 75685997 is 79958657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66113161 + 9572836 = 8131^2 + 3094^2 .

It is a cyclic number.

It is not a de Polignac number, because 75685997 - 2² = 75685993 is a prime.

Together with 75685999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75685991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37842998 + 37842999.

It is an arithmetic number, because the mean of its divisors is an integer number (37842999).

Almost surely, 2^75685997 is an apocalyptic number.

It is an amenable number.

75685997 is a deficient number, since it is larger than the sum of its proper divisors (1).

75685997 is an equidigital number, since it uses as much as digits as its factorization.

75685997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 56.

The square root of 75685997 is about 8699.7699394869. The cubic root of 75685997 is about 422.9981929440.

The spelling of 75685997 in words is "seventy-five million, six hundred eighty-five thousand, nine hundred ninety-seven".