3981610001 has 8 divisors (see below), whose sum is σ = 4295367144. Its totient is φ = 3676691200.

The previous prime is 3981609979. The next prime is 3981610007. The reversal of 3981610001 is 1000161893.

It is a happy number.

It is a Cunningham number, because it is equal to 63100²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 2870387776 + 1111222225 = 53576^2 + 33335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3981610001 - 2⁶ = 3981609937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3981610007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2208650 + ... + 2210451.

It is an arithmetic number, because the mean of its divisors is an integer number (536920893).

Almost surely, 2^3981610001 is an apocalyptic number.

It is an amenable number.

3981610001 is a deficient number, since it is larger than the sum of its proper divisors (313757143).

3981610001 is a wasteful number, since it uses less digits than its factorization.

3981610001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419171.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 3981610001 is about 63100.0000079239. Note that the first 5 decimals coincide. The cubic root of 3981610001 is about 1584.9646223366.

Adding to 3981610001 its reverse (1000161893), we get a palindrome (4981771894).

The spelling of 3981610001 in words is "three billion, nine hundred eighty-one million, six hundred ten thousand, one".