981210001 has 4 divisors (see below), whose sum is σ = 988936192. Its totient is φ = 973483812.

The previous prime is 981209987. The next prime is 981210007. The reversal of 981210001 is 100012189.

981210001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 981210001 - 2¹⁷ = 981078929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981210007) 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, 3862905 + ... + 3863158.

It is an arithmetic number, because the mean of its divisors is an integer number (247234048).

Almost surely, 2^981210001 is an apocalyptic number.

It is an amenable number.

981210001 is a deficient number, since it is larger than the sum of its proper divisors (7726191).

981210001 is a wasteful number, since it uses less digits than its factorization.

981210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7726190.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 981210001 is about 31324.2717553018. The cubic root of 981210001 is about 993.6970229475.

The spelling of 981210001 in words is "nine hundred eighty-one million, two hundred ten thousand, one".