69839797 has 2 divisors, whose sum is σ = 69839798. Its totient is φ = 69839796.

The previous prime is 69839779. The next prime is 69839821. The reversal of 69839797 is 79793896.

Together with previous prime (69839779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59120721 + 10719076 = 7689^2 + 3274^2 .

It is a cyclic number.

It is not a de Polignac number, because 69839797 - 2⁷ = 69839669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69839717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34919898 + 34919899.

It is an arithmetic number, because the mean of its divisors is an integer number (34919899).

Almost surely, 2^69839797 is an apocalyptic number.

It is an amenable number.

69839797 is a deficient number, since it is larger than the sum of its proper divisors (1).

69839797 is an equidigital number, since it uses as much as digits as its factorization.

69839797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 58.

The square root of 69839797 is about 8357.0208208428. The cubic root of 69839797 is about 411.8138887474.

The spelling of 69839797 in words is "sixty-nine million, eight hundred thirty-nine thousand, seven hundred ninety-seven".