9657212129 has 2 divisors, whose sum is σ = 9657212130. Its totient is φ = 9657212128.

The previous prime is 9657212113. The next prime is 9657212171. The reversal of 9657212129 is 9212127569.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8779690000 + 877522129 = 93700^2 + 29623^2 .

It is a cyclic number.

It is not a de Polignac number, because 9657212129 - 2⁴ = 9657212113 is a prime.

It is a super-2 number, since 2×9657212129² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9657212129.

It is not a weakly prime, because it can be changed into another prime (9657212179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828606064 + 4828606065.

It is an arithmetic number, because the mean of its divisors is an integer number (4828606065).

Almost surely, 2^9657212129 is an apocalyptic number.

It is an amenable number.

9657212129 is a deficient number, since it is larger than the sum of its proper divisors (1).

9657212129 is an equidigital number, since it uses as much as digits as its factorization.

9657212129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 9657212129 is about 98271.1154358187. The cubic root of 9657212129 is about 2129.5307899148.

The spelling of 9657212129 in words is "nine billion, six hundred fifty-seven million, two hundred twelve thousand, one hundred twenty-nine".