9928621001 has 8 divisors (see below), whose sum is σ = 10694867400. Its totient is φ = 9162732672.

The previous prime is 9928620997. The next prime is 9928621063. The reversal of 9928621001 is 1001268299.

It can be written as a sum of positive squares in 4 ways, for example, as 491401 + 9928129600 = 701^2 + 99640^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9928621001 - 2² = 9928620997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9928621081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30476 + ... + 144173.

It is an arithmetic number, because the mean of its divisors is an integer number (1336858425).

Almost surely, 2^9928621001 is an apocalyptic number.

It is an amenable number.

9928621001 is a deficient number, since it is larger than the sum of its proper divisors (766246399).

9928621001 is a wasteful number, since it uses less digits than its factorization.

9928621001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179035.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 9928621001 is about 99642.4658516639. The cubic root of 9928621001 is about 2149.2963986475.

The spelling of 9928621001 in words is "nine billion, nine hundred twenty-eight million, six hundred twenty-one thousand, one".