97643221001 has 16 divisors (see below), whose sum is σ = 102066980688. Its totient is φ = 93317702400.

The previous prime is 97643220991. The next prime is 97643221033. The reversal of 97643221001 is 10012234679.

It can be written as a sum of positive squares in 8 ways, for example, as 2007040000 + 95636181001 = 44800^2 + 309251^2 .

It is a de Polignac number, because none of the positive numbers 2^k-97643221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97643221061) 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, 1624871 + ... + 1683891.

It is an arithmetic number, because the mean of its divisors is an integer number (6379186293).

Almost surely, 2^97643221001 is an apocalyptic number.

It is an amenable number.

97643221001 is a deficient number, since it is larger than the sum of its proper divisors (4423759687).

97643221001 is a wasteful number, since it uses less digits than its factorization.

97643221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59852.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 97643221001 in words is "ninety-seven billion, six hundred forty-three million, two hundred twenty-one thousand, one".