9640829291 has 2 divisors, whose sum is σ = 9640829292. Its totient is φ = 9640829290.

The previous prime is 9640829287. The next prime is 9640829299. The reversal of 9640829291 is 1929280469.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9640829291 - 2² = 9640829287 is a prime.

It is not a weakly prime, because it can be changed into another prime (9640829299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820414645 + 4820414646.

It is an arithmetic number, because the mean of its divisors is an integer number (4820414646).

Almost surely, 2^9640829291 is an apocalyptic number.

9640829291 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640829291 is an equidigital number, since it uses as much as digits as its factorization.

9640829291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 9640829291 is about 98187.7247470375. The cubic root of 9640829291 is about 2128.3259044063.

The spelling of 9640829291 in words is "nine billion, six hundred forty million, eight hundred twenty-nine thousand, two hundred ninety-one".