9801845 has 4 divisors (see below), whose sum is σ = 11762220. Its totient is φ = 7841472.

The previous prime is 9801839. The next prime is 9801851. The reversal of 9801845 is 5481089.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5481089 = 17 ⋅322417.

It is an interprime number because it is at equal distance from previous prime (9801839) and next prime (9801851).

It can be written as a sum of positive squares in 2 ways, for example, as 3073009 + 6728836 = 1753^2 + 2594^2 .

It is a cyclic number.

It is not a de Polignac number, because 9801845 - 2¹⁰ = 9800821 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980180 + ... + 980189.

It is an arithmetic number, because the mean of its divisors is an integer number (2940555).

Almost surely, 2^9801845 is an apocalyptic number.

It is an amenable number.

9801845 is a deficient number, since it is larger than the sum of its proper divisors (1960375).

9801845 is a wasteful number, since it uses less digits than its factorization.

9801845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960374.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 9801845 is about 3130.7898364470. The cubic root of 9801845 is about 214.0109247050.

The spelling of 9801845 in words is "nine million, eight hundred one thousand, eight hundred forty-five".