69997 has 2 divisors, whose sum is σ = 69998. Its totient is φ = 69996.

The previous prime is 69991. The next prime is 70001. The reversal of 69997 is 79996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67081 + 2916 = 259^2 + 54^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69997 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69991) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34998 + 34999.

It is an arithmetic number, because the mean of its divisors is an integer number (34999).

2⁶⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

69997 is a deficient number, since it is larger than the sum of its proper divisors (1).

69997 is an equidigital number, since it uses as much as digits as its factorization.

69997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 40.

The square root of 69997 is about 264.5694615786. The cubic root of 69997 is about 41.2122642346.

Subtracting 69997 from its reverse (79996), we obtain a palindrome (9999).

The spelling of 69997 in words is "sixty-nine thousand, nine hundred ninety-seven".