9690609491 has 2 divisors, whose sum is σ = 9690609492. Its totient is φ = 9690609490.

The previous prime is 9690609451. The next prime is 9690609503. The reversal of 9690609491 is 1949060969.

It is a strong prime.

It is an emirp because it is prime and its reverse (1949060969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9690609491 - 2¹⁰ = 9690608467 is a prime.

It is not a weakly prime, because it can be changed into another prime (9690609451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4845304745 + 4845304746.

It is an arithmetic number, because the mean of its divisors is an integer number (4845304746).

Almost surely, 2^9690609491 is an apocalyptic number.

9690609491 is a deficient number, since it is larger than the sum of its proper divisors (1).

9690609491 is an equidigital number, since it uses as much as digits as its factorization.

9690609491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 9690609491 is about 98440.8933878599. The cubic root of 9690609491 is about 2131.9828047658.

The spelling of 9690609491 in words is "nine billion, six hundred ninety million, six hundred nine thousand, four hundred ninety-one".