659309641 has 2 divisors, whose sum is σ = 659309642. Its totient is φ = 659309640.

The previous prime is 659309617. The next prime is 659309689. The reversal of 659309641 is 146903956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 468289600 + 191020041 = 21640^2 + 13821^2 .

It is a cyclic number.

It is not a de Polignac number, because 659309641 - 2²⁵ = 625755209 is a prime.

It is not a weakly prime, because it can be changed into another prime (659309611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329654820 + 329654821.

It is an arithmetic number, because the mean of its divisors is an integer number (329654821).

Almost surely, 2^659309641 is an apocalyptic number.

It is an amenable number.

659309641 is a deficient number, since it is larger than the sum of its proper divisors (1).

659309641 is an equidigital number, since it uses as much as digits as its factorization.

659309641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 659309641 is about 25677.0255481432. The cubic root of 659309641 is about 870.3550939604.

The spelling of 659309641 in words is "six hundred fifty-nine million, three hundred nine thousand, six hundred forty-one".