3855091 has 2 divisors, whose sum is σ = 3855092. Its totient is φ = 3855090.

The previous prime is 3855083. The next prime is 3855127. The reversal of 3855091 is 1905583.

It is a weak prime.

It is an emirp because it is prime and its reverse (1905583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3855091 - 2³ = 3855083 is a prime.

It is not a weakly prime, because it can be changed into another prime (3855041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1927545 + 1927546.

It is an arithmetic number, because the mean of its divisors is an integer number (1927546).

Almost surely, 2^3855091 is an apocalyptic number.

3855091 is a deficient number, since it is larger than the sum of its proper divisors (1).

3855091 is an equidigital number, since it uses as much as digits as its factorization.

3855091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 3855091 is about 1963.4385653745. The cubic root of 3855091 is about 156.7995738526.

It can be divided in two parts, 385 and 5091, that added together give a square (5476 = 74²).

The spelling of 3855091 in words is "three million, eight hundred fifty-five thousand, ninety-one".