3982872101 has 4 divisors (see below), whose sum is σ = 4289246892. Its totient is φ = 3676497312.

The previous prime is 3982872079. The next prime is 3982872107. The reversal of 3982872101 is 1012782893.

It is a Cunningham number, because it is equal to 63110²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1012782893 = 3319 ⋅305147.

It can be written as a sum of positive squares in 2 ways, for example, as 589227076 + 3393645025 = 24274^2 + 58255^2 .

It is a cyclic number.

It is not a de Polignac number, because 3982872101 - 2²² = 3978677797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3982872107) 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, 153187376 + ... + 153187401.

It is an arithmetic number, because the mean of its divisors is an integer number (1072311723).

Almost surely, 2^3982872101 is an apocalyptic number.

It is an amenable number.

3982872101 is a deficient number, since it is larger than the sum of its proper divisors (306374791).

3982872101 is a wasteful number, since it uses less digits than its factorization.

3982872101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306374790.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 3982872101 is about 63110.0000079227. Note that the first 5 decimals coincide. The cubic root of 3982872101 is about 1585.1320732358.

The spelling of 3982872101 in words is "three billion, nine hundred eighty-two million, eight hundred seventy-two thousand, one hundred one".