9690141991 has 2 divisors, whose sum is σ = 9690141992. Its totient is φ = 9690141990.

The previous prime is 9690141961. The next prime is 9690142027. The reversal of 9690141991 is 1991410969.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9690141991 - 2⁵ = 9690141959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9690141941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4845070995 + 4845070996.

It is an arithmetic number, because the mean of its divisors is an integer number (4845070996).

Almost surely, 2^9690141991 is an apocalyptic number.

9690141991 is a deficient number, since it is larger than the sum of its proper divisors (1).

9690141991 is an equidigital number, since it uses as much as digits as its factorization.

9690141991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 49.

The square root of 9690141991 is about 98438.5188379021. The cubic root of 9690141991 is about 2131.9485200977.

The spelling of 9690141991 in words is "nine billion, six hundred ninety million, one hundred forty-one thousand, nine hundred ninety-one".