3855387407 has 2 divisors, whose sum is σ = 3855387408. Its totient is φ = 3855387406.

The previous prime is 3855387311. The next prime is 3855387409. The reversal of 3855387407 is 7047835583.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3855387407 - 2¹⁶ = 3855321871 is a prime.

Together with 3855387409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3855387409) 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 as a sum of consecutive naturals, namely, 1927693703 + 1927693704.

It is an arithmetic number, because the mean of its divisors is an integer number (1927693704).

Almost surely, 2^3855387407 is an apocalyptic number.

3855387407 is a deficient number, since it is larger than the sum of its proper divisors (1).

3855387407 is an equidigital number, since it uses as much as digits as its factorization.

3855387407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The square root of 3855387407 is about 62091.7660161152. The cubic root of 3855387407 is about 1568.0359237429.

The spelling of 3855387407 in words is "three billion, eight hundred fifty-five million, three hundred eighty-seven thousand, four hundred seven".