381842549 has 4 divisors (see below), whose sum is σ = 416555520. Its totient is φ = 347129580.

The previous prime is 381842543. The next prime is 381842567. The reversal of 381842549 is 945248183.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381842549 - 2⁴ = 381842533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381842543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17356469 + ... + 17356490.

It is an arithmetic number, because the mean of its divisors is an integer number (104138880).

Almost surely, 2^381842549 is an apocalyptic number.

It is an amenable number.

381842549 is a deficient number, since it is larger than the sum of its proper divisors (34712971).

381842549 is a wasteful number, since it uses less digits than its factorization.

381842549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34712970.

The product of its digits is 276480, while the sum is 44.

The square root of 381842549 is about 19540.7919235634. The cubic root of 381842549 is about 725.4844476807.

The spelling of 381842549 in words is "three hundred eighty-one million, eight hundred forty-two thousand, five hundred forty-nine".