3868921061 has 4 divisors (see below), whose sum is σ = 3869700000. Its totient is φ = 3868142124.

The previous prime is 3868921051. The next prime is 3868921073. The reversal of 3868921061 is 1601298683.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1601298683 = 28307 ⋅56569.

It is a cyclic number.

It is not a de Polignac number, because 3868921061 - 2³⁰ = 2795179237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3868921051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381971 + ... + 391968.

It is an arithmetic number, because the mean of its divisors is an integer number (967425000).

Almost surely, 2^3868921061 is an apocalyptic number.

It is an amenable number.

3868921061 is a deficient number, since it is larger than the sum of its proper divisors (778939).

3868921061 is an equidigital number, since it uses as much as digits as its factorization.

3868921061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778938.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 3868921061 is about 62200.6516123425. The cubic root of 3868921061 is about 1569.8685517492.

The spelling of 3868921061 in words is "three billion, eight hundred sixty-eight million, nine hundred twenty-one thousand, sixty-one".