9919801 has 4 divisors (see below), whose sum is σ = 9961204. Its totient is φ = 9878400.

The previous prime is 9919727. The next prime is 9919813. The reversal of 9919801 is 1089199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1089199 = 59 ⋅18461.

It can be written as a sum of positive squares in 2 ways, for example, as 7295401 + 2624400 = 2701^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 9919801 - 2¹³ = 9911609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9919841) 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, 20340 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (2490301).

Almost surely, 2^9919801 is an apocalyptic number.

It is an amenable number.

9919801 is a deficient number, since it is larger than the sum of its proper divisors (41403).

9919801 is a wasteful number, since it uses less digits than its factorization.

9919801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41402.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 9919801 is about 3149.5715581647. The cubic root of 9919801 is about 214.8659774068.

It can be divided in two parts, 99 and 19801, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 9919801 in words is "nine million, nine hundred nineteen thousand, eight hundred one".