659626997 has 2 divisors, whose sum is σ = 659626998. Its totient is φ = 659626996.

The previous prime is 659626969. The next prime is 659627053. The reversal of 659626997 is 799626956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529644196 + 129982801 = 23014^2 + 11401^2 .

It is a cyclic number.

It is not a de Polignac number, because 659626997 - 2¹⁴ = 659610613 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 (659626397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329813498 + 329813499.

It is an arithmetic number, because the mean of its divisors is an integer number (329813499).

Almost surely, 2^659626997 is an apocalyptic number.

It is an amenable number.

659626997 is a deficient number, since it is larger than the sum of its proper divisors (1).

659626997 is an equidigital number, since it uses as much as digits as its factorization.

659626997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11022480, while the sum is 59.

The square root of 659626997 is about 25683.2045703024. The cubic root of 659626997 is about 870.4947188488.

The spelling of 659626997 in words is "six hundred fifty-nine million, six hundred twenty-six thousand, nine hundred ninety-seven".