381006849 has 4 divisors (see below), whose sum is σ = 508009136. Its totient is φ = 254004564.

The previous prime is 381006817. The next prime is 381006853. The reversal of 381006849 is 948600183.

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 not a de Polignac number, because 381006849 - 2⁵ = 381006817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381006859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63501139 + ... + 63501144.

It is an arithmetic number, because the mean of its divisors is an integer number (127002284).

Almost surely, 2^381006849 is an apocalyptic number.

It is an amenable number.

381006849 is a deficient number, since it is larger than the sum of its proper divisors (127002287).

381006849 is a wasteful number, since it uses less digits than its factorization.

381006849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127002286.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 381006849 is about 19519.3967376044. The cubic root of 381006849 is about 724.9547963889.

The spelling of 381006849 in words is "three hundred eighty-one million, six thousand, eight hundred forty-nine".