9928992901 has 4 divisors (see below), whose sum is σ = 9992235052. Its totient is φ = 9865750752.

The previous prime is 9928992893. The next prime is 9928992911. The reversal of 9928992901 is 1092998299.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1092998299 = 367 ⋅2978197.

It can be written as a sum of positive squares in 2 ways, for example, as 7366102276 + 2562890625 = 85826^2 + 50625^2 .

It is a cyclic number.

It is not a de Polignac number, because 9928992901 - 2³ = 9928992893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928992911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31620840 + ... + 31621153.

It is an arithmetic number, because the mean of its divisors is an integer number (2498058763).

Almost surely, 2^9928992901 is an apocalyptic number.

It is an amenable number.

9928992901 is a deficient number, since it is larger than the sum of its proper divisors (63242151).

9928992901 is a wasteful number, since it uses less digits than its factorization.

9928992901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63242150.

The product of its (nonzero) digits is 1889568, while the sum is 58.

The square root of 9928992901 is about 99644.3320063916. The cubic root of 9928992901 is about 2149.3232339737.

The spelling of 9928992901 in words is "nine billion, nine hundred twenty-eight million, nine hundred ninety-two thousand, nine hundred one".