3921963533 has 6 divisors (see below), whose sum is σ = 3977985582. Its totient is φ = 3866719640.

The previous prime is 3921963503. The next prime is 3921963541. The reversal of 3921963533 is 3353691293.

It can be written as a sum of positive squares in only one way, i.e., 3745684804 + 176278729 = 61202^2 + 13277^2 .

It is not a de Polignac number, because 3921963533 - 2²⁰ = 3920914957 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 (3921963503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 383966 + ... + 394047.

It is an arithmetic number, because the mean of its divisors is an integer number (662997597).

Almost surely, 2^3921963533 is an apocalyptic number.

It is an amenable number.

3921963533 is a deficient number, since it is larger than the sum of its proper divisors (56022049).

3921963533 is an frugal number, since it uses more digits than its factorization.

3921963533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778155 (or 778084 counting only the distinct ones).

The product of its digits is 393660, while the sum is 44.

The square root of 3921963533 is about 62625.5820970951. The cubic root of 3921963533 is about 1577.0102535433.

The spelling of 3921963533 in words is "three billion, nine hundred twenty-one million, nine hundred sixty-three thousand, five hundred thirty-three".