381261717 has 12 divisors (see below), whose sum is σ = 560046240. Its totient is φ = 249866088.

The previous prime is 381261707. The next prime is 381261719. The reversal of 381261717 is 717162183.

381261717 is a `hidden beast` number, since 38 + 1 + 2 + 617 + 1 + 7 = 666.

It is not a de Polignac number, because 381261717 - 2⁷ = 381261589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381261719) 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 in 11 ways as a sum of consecutive naturals, for example, 358473 + ... + 359534.

It is an arithmetic number, because the mean of its divisors is an integer number (46670520).

Almost surely, 2^381261717 is an apocalyptic number.

It is an amenable number.

381261717 is a deficient number, since it is larger than the sum of its proper divisors (178784523).

381261717 is a wasteful number, since it uses less digits than its factorization.

381261717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718072 (or 718069 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 381261717 is about 19525.9242290858. The cubic root of 381261717 is about 725.1164090526.

The spelling of 381261717 in words is "three hundred eighty-one million, two hundred sixty-one thousand, seven hundred seventeen".