9657212131 has 4 divisors (see below), whose sum is σ = 11036813872. Its totient is φ = 8277610392.

The previous prime is 9657212129. The next prime is 9657212171. The reversal of 9657212131 is 1312127569.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312127569 = 887 ⋅1479287.

It is a cyclic number.

It is not a de Polignac number, because 9657212131 - 2¹ = 9657212129 is a prime.

It is a super-2 number, since 2×9657212131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9657212171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689800860 + ... + 689800873.

It is an arithmetic number, because the mean of its divisors is an integer number (2759203468).

Almost surely, 2^9657212131 is an apocalyptic number.

9657212131 is a deficient number, since it is larger than the sum of its proper divisors (1379601741).

9657212131 is a wasteful number, since it uses less digits than its factorization.

9657212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379601740.

The product of its digits is 22680, while the sum is 37.

The square root of 9657212131 is about 98271.1154459946. The cubic root of 9657212131 is about 2129.5307900618.

The spelling of 9657212131 in words is "nine billion, six hundred fifty-seven million, two hundred twelve thousand, one hundred thirty-one".