381969849 has 4 divisors (see below), whose sum is σ = 509293136. Its totient is φ = 254646564.

The previous prime is 381969839. The next prime is 381969851. The reversal of 381969849 is 948969183.

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 381969849 - 2⁸ = 381969593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381969829) 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, 63661639 + ... + 63661644.

It is an arithmetic number, because the mean of its divisors is an integer number (127323284).

Almost surely, 2^381969849 is an apocalyptic number.

It is an amenable number.

381969849 is a deficient number, since it is larger than the sum of its proper divisors (127323287).

381969849 is a wasteful number, since it uses less digits than its factorization.

381969849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127323286.

The product of its digits is 3359232, while the sum is 57.

The square root of 381969849 is about 19544.0489407901. The cubic root of 381969849 is about 725.5650602344.

The spelling of 381969849 in words is "three hundred eighty-one million, nine hundred sixty-nine thousand, eight hundred forty-nine".