9531678901 has 2 divisors, whose sum is σ = 9531678902. Its totient is φ = 9531678900.

The previous prime is 9531678899. The next prime is 9531678911. The reversal of 9531678901 is 1098761359.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9531616900 + 62001 = 97630^2 + 249^2 .

It is a cyclic number.

It is not a de Polignac number, because 9531678901 - 2¹ = 9531678899 is a prime.

Together with 9531678899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9531678911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4765839450 + 4765839451.

It is an arithmetic number, because the mean of its divisors is an integer number (4765839451).

Almost surely, 2^9531678901 is an apocalyptic number.

It is an amenable number.

9531678901 is a deficient number, since it is larger than the sum of its proper divisors (1).

9531678901 is an equidigital number, since it uses as much as digits as its factorization.

9531678901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 9531678901 is about 97630.3175299558. The cubic root of 9531678901 is about 2120.2633247285.

The spelling of 9531678901 in words is "nine billion, five hundred thirty-one million, six hundred seventy-eight thousand, nine hundred one".