381285613 has 2 divisors, whose sum is σ = 381285614. Its totient is φ = 381285612.

The previous prime is 381285607. The next prime is 381285683. The reversal of 381285613 is 316582183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289068004 + 92217609 = 17002^2 + 9603^2 .

It is a cyclic number.

It is not a de Polignac number, because 381285613 - 2⁹ = 381285101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381285683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190642806 + 190642807.

It is an arithmetic number, because the mean of its divisors is an integer number (190642807).

Almost surely, 2^381285613 is an apocalyptic number.

It is an amenable number.

381285613 is a deficient number, since it is larger than the sum of its proper divisors (1).

381285613 is an equidigital number, since it uses as much as digits as its factorization.

381285613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 381285613 is about 19526.5361239519. The cubic root of 381285613 is about 725.1315578939.

The spelling of 381285613 in words is "three hundred eighty-one million, two hundred eighty-five thousand, six hundred thirteen".