9631899997 has 2 divisors, whose sum is σ = 9631899998. Its totient is φ = 9631899996.

The previous prime is 9631899961. The next prime is 9631900013. The reversal of 9631899997 is 7999981369.

9631899997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9006199801 + 625700196 = 94901^2 + 25014^2 .

It is a cyclic number.

It is not a de Polignac number, because 9631899997 - 2²⁷ = 9497682269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9631899397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4815949998 + 4815949999.

It is an arithmetic number, because the mean of its divisors is an integer number (4815949999).

Almost surely, 2^9631899997 is an apocalyptic number.

It is an amenable number.

9631899997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9631899997 is an equidigital number, since it uses as much as digits as its factorization.

9631899997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59521392, while the sum is 70.

The square root of 9631899997 is about 98142.2436925099. The cubic root of 9631899997 is about 2127.6686193860.

The spelling of 9631899997 in words is "nine billion, six hundred thirty-one million, eight hundred ninety-nine thousand, nine hundred ninety-seven".