659957797 has 2 divisors, whose sum is σ = 659957798. Its totient is φ = 659957796.

The previous prime is 659957777. The next prime is 659957801. The reversal of 659957797 is 797759956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 585204481 + 74753316 = 24191^2 + 8646^2 .

It is a cyclic number.

It is not a de Polignac number, because 659957797 - 2¹⁵ = 659925029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659957717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329978898 + 329978899.

It is an arithmetic number, because the mean of its divisors is an integer number (329978899).

Almost surely, 2^659957797 is an apocalyptic number.

It is an amenable number.

659957797 is a deficient number, since it is larger than the sum of its proper divisors (1).

659957797 is an equidigital number, since it uses as much as digits as its factorization.

659957797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37507050, while the sum is 64.

The square root of 659957797 is about 25689.6437694258. The cubic root of 659957797 is about 870.6402109379.

The spelling of 659957797 in words is "six hundred fifty-nine million, nine hundred fifty-seven thousand, seven hundred ninety-seven".