9781963201 has 4 divisors (see below), whose sum is σ = 9905785600. Its totient is φ = 9658140804.

The previous prime is 9781963199. The next prime is 9781963259. The reversal of 9781963201 is 1023691879.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9781963201 - 2¹ = 9781963199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9781963271) 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, 61911081 + ... + 61911238.

It is an arithmetic number, because the mean of its divisors is an integer number (2476446400).

Almost surely, 2^9781963201 is an apocalyptic number.

It is an amenable number.

9781963201 is a deficient number, since it is larger than the sum of its proper divisors (123822399).

9781963201 is a wasteful number, since it uses less digits than its factorization.

9781963201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123822398.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 9781963201 is about 98903.8078185062. The cubic root of 9781963201 is about 2138.6612875790.

The spelling of 9781963201 in words is "nine billion, seven hundred eighty-one million, nine hundred sixty-three thousand, two hundred one".