9859140691 has 2 divisors, whose sum is σ = 9859140692. Its totient is φ = 9859140690.

The previous prime is 9859140689. The next prime is 9859140721. The reversal of 9859140691 is 1960419589.

It is a happy number.

9859140691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9859140691 - 2¹ = 9859140689 is a prime.

Together with 9859140689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9859140611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4929570345 + 4929570346.

It is an arithmetic number, because the mean of its divisors is an integer number (4929570346).

Almost surely, 2^9859140691 is an apocalyptic number.

9859140691 is a deficient number, since it is larger than the sum of its proper divisors (1).

9859140691 is an equidigital number, since it uses as much as digits as its factorization.

9859140691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 52.

The square root of 9859140691 is about 99293.2056638318. The cubic root of 9859140691 is about 2144.2710788940.

The spelling of 9859140691 in words is "nine billion, eight hundred fifty-nine million, one hundred forty thousand, six hundred ninety-one".