9697688551 has 2 divisors, whose sum is σ = 9697688552. Its totient is φ = 9697688550.

The previous prime is 9697688527. The next prime is 9697688557. The reversal of 9697688551 is 1558867969.

9697688551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9697688551 - 2¹¹ = 9697686503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9697688557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4848844275 + 4848844276.

It is an arithmetic number, because the mean of its divisors is an integer number (4848844276).

Almost surely, 2^9697688551 is an apocalyptic number.

9697688551 is a deficient number, since it is larger than the sum of its proper divisors (1).

9697688551 is an equidigital number, since it uses as much as digits as its factorization.

9697688551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32659200, while the sum is 64.

The square root of 9697688551 is about 98476.8427144169. The cubic root of 9697688551 is about 2132.5018213338.

The spelling of 9697688551 in words is "nine billion, six hundred ninety-seven million, six hundred eighty-eight thousand, five hundred fifty-one".