3854513021 has 2 divisors, whose sum is σ = 3854513022. Its totient is φ = 3854513020.

The previous prime is 3854513017. The next prime is 3854513023. The reversal of 3854513021 is 1203154583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3647556025 + 206956996 = 60395^2 + 14386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3854513021 - 2² = 3854513017 is a prime.

It is a Sophie Germain prime.

Together with 3854513023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3854513023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1927256510 + 1927256511.

It is an arithmetic number, because the mean of its divisors is an integer number (1927256511).

Almost surely, 2^3854513021 is an apocalyptic number.

It is an amenable number.

3854513021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3854513021 is an equidigital number, since it uses as much as digits as its factorization.

3854513021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 3854513021 is about 62084.7245383275. The cubic root of 3854513021 is about 1567.9173734151.

It can be divided in two parts, 38545130 and 21, that multiplied together give a triangular number (809447730 = T₄₀₂₃₅).

The spelling of 3854513021 in words is "three billion, eight hundred fifty-four million, five hundred thirteen thousand, twenty-one".