259646957 has 2 divisors, whose sum is σ = 259646958. Its totient is φ = 259646956.

The previous prime is 259646939. The next prime is 259646963. The reversal of 259646957 is 759646952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181872196 + 77774761 = 13486^2 + 8819^2 .

It is a cyclic number.

It is not a de Polignac number, because 259646957 - 2¹⁰ = 259645933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 259646899 and 259646908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259646987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129823478 + 129823479.

It is an arithmetic number, because the mean of its divisors is an integer number (129823479).

Almost surely, 2^259646957 is an apocalyptic number.

It is an amenable number.

259646957 is a deficient number, since it is larger than the sum of its proper divisors (1).

259646957 is an equidigital number, since it uses as much as digits as its factorization.

259646957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 53.

The square root of 259646957 is about 16113.5643791186. The cubic root of 259646957 is about 637.9614146140.

The spelling of 259646957 in words is "two hundred fifty-nine million, six hundred forty-six thousand, nine hundred fifty-seven".