9801813 has 24 divisors (see below), whose sum is σ = 15348960. Its totient is φ = 5547360.

The previous prime is 9801811. The next prime is 9801817. The reversal of 9801813 is 3181089.

It is not a de Polignac number, because 9801813 - 2¹ = 9801811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9801811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19003 + ... + 19511.

It is an arithmetic number, because the mean of its divisors is an integer number (639540).

Almost surely, 2^9801813 is an apocalyptic number.

It is an amenable number.

9801813 is a deficient number, since it is larger than the sum of its proper divisors (5547147).

9801813 is a wasteful number, since it uses less digits than its factorization.

9801813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 9801813 is about 3130.7847259114. The cubic root of 9801813 is about 214.0106918116.

The spelling of 9801813 in words is "nine million, eight hundred one thousand, eight hundred thirteen".