9897822001 has 16 divisors (see below), whose sum is σ = 10621670400. Its totient is φ = 9200656080.

The previous prime is 9897821993. The next prime is 9897822049. The reversal of 9897822001 is 1002287989.

It is a cyclic number.

It is not a de Polignac number, because 9897822001 - 2³ = 9897821993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9897822301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171666 + ... + 221956.

It is an arithmetic number, because the mean of its divisors is an integer number (663854400).

Almost surely, 2^9897822001 is an apocalyptic number.

It is an amenable number.

9897822001 is a deficient number, since it is larger than the sum of its proper divisors (723848399).

9897822001 is a wasteful number, since it uses less digits than its factorization.

9897822001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50556.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 9897822001 is about 99487.7982518459. The cubic root of 9897822001 is about 2147.0716940701.

It can be divided in two parts, 989 and 7822001, that added together give a triangular number (7822990 = T₃₉₅₅).

The spelling of 9897822001 in words is "nine billion, eight hundred ninety-seven million, eight hundred twenty-two thousand, one".