696220997 has 2 divisors, whose sum is σ = 696220998. Its totient is φ = 696220996.

The previous prime is 696220991. The next prime is 696221021. The reversal of 696220997 is 799022696.

It is a Cunningham number, because it is equal to 26386²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696220996 + 1 = 26386^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 696220997 - 2¹⁰ = 696219973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696220991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348110498 + 348110499.

It is an arithmetic number, because the mean of its divisors is an integer number (348110499).

Almost surely, 2^696220997 is an apocalyptic number.

It is an amenable number.

696220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

696220997 is an equidigital number, since it uses as much as digits as its factorization.

696220997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 696220997 is about 26386.0000189494. Note that the first 4 decimals coincide. The cubic root of 696220997 is about 886.3033121361.

The spelling of 696220997 in words is "six hundred ninety-six million, two hundred twenty thousand, nine hundred ninety-seven".