3855013 has 2 divisors, whose sum is σ = 3855014. Its totient is φ = 3855012.

The previous prime is 3854989. The next prime is 3855023. The reversal of 3855013 is 3105583.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3814209 + 40804 = 1953^2 + 202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3855013 is a prime.

It is a super-2 number, since 2×3855013² = 29722250460338, which contains 22 as substring.

3855013 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3855023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1927506 + 1927507.

It is an arithmetic number, because the mean of its divisors is an integer number (1927507).

Almost surely, 2^3855013 is an apocalyptic number.

It is an amenable number.

3855013 is a deficient number, since it is larger than the sum of its proper divisors (1).

3855013 is an equidigital number, since it uses as much as digits as its factorization.

3855013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 3855013 is about 1963.4187021621. The cubic root of 3855013 is about 156.7985163377.

The spelling of 3855013 in words is "three million, eight hundred fifty-five thousand, thirteen".