3851276921 has 2 divisors, whose sum is σ = 3851276922. Its totient is φ = 3851276920.

The previous prime is 3851276893. The next prime is 3851276981. The reversal of 3851276921 is 1296721583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3823567225 + 27709696 = 61835^2 + 5264^2 .

It is an emirp because it is prime and its reverse (1296721583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3851276921 - 2⁶ = 3851276857 is a prime.

It is a super-3 number, since 3×3851276921³ (a number of 30 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (3851276981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1925638460 + 1925638461.

It is an arithmetic number, because the mean of its divisors is an integer number (1925638461).

Almost surely, 2^3851276921 is an apocalyptic number.

It is an amenable number.

3851276921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3851276921 is an equidigital number, since it uses as much as digits as its factorization.

3851276921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 3851276921 is about 62058.6570995538. The cubic root of 3851276921 is about 1567.4784629736.

The spelling of 3851276921 in words is "three billion, eight hundred fifty-one million, two hundred seventy-six thousand, nine hundred twenty-one".