9686421929 has 4 divisors (see below), whose sum is σ = 9688570884. Its totient is φ = 9684272976.

The previous prime is 9686421911. The next prime is 9686421947. The reversal of 9686421929 is 9291246869.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9291246869 = 23627 ⋅393247.

It is an interprime number because it is at equal distance from previous prime (9686421911) and next prime (9686421947).

It can be written as a sum of positive squares in 2 ways, for example, as 111408025 + 9575013904 = 10555^2 + 97852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9686421929 is a prime.

It is a super-2 number, since 2×9686421929² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9686421529) 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, 1067702 + ... + 1076735.

It is an arithmetic number, because the mean of its divisors is an integer number (2422142721).

Almost surely, 2^9686421929 is an apocalyptic number.

It is an amenable number.

9686421929 is a deficient number, since it is larger than the sum of its proper divisors (2148955).

9686421929 is a wasteful number, since it uses less digits than its factorization.

9686421929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148954.

The product of its digits is 3359232, while the sum is 56.

The square root of 9686421929 is about 98419.6216666169. The cubic root of 9686421929 is about 2131.6756656233.

The spelling of 9686421929 in words is "nine billion, six hundred eighty-six million, four hundred twenty-one thousand, nine hundred twenty-nine".