3961920101 has 4 divisors (see below), whose sum is σ = 3962582412. Its totient is φ = 3961257792.

The previous prime is 3961920059. The next prime is 3961920113. The reversal of 3961920101 is 1010291693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1010291693 = 19 ⋅53173247.

It can be written as a sum of positive squares in 2 ways, for example, as 268927201 + 3692992900 = 16399^2 + 60770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3961920101 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 (3961920161) 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, 322100 + ... + 334173.

It is an arithmetic number, because the mean of its divisors is an integer number (990645603).

Almost surely, 2^3961920101 is an apocalyptic number.

It is an amenable number.

3961920101 is a deficient number, since it is larger than the sum of its proper divisors (662311).

3961920101 is an equidigital number, since it uses as much as digits as its factorization.

3961920101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662310.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 3961920101 is about 62943.7852452488. The cubic root of 3961920101 is about 1582.3476424593.

The spelling of 3961920101 in words is "three billion, nine hundred sixty-one million, nine hundred twenty thousand, one hundred one".