381642149 has 8 divisors (see below), whose sum is σ = 443555520. Its totient is φ = 321577056.

The previous prime is 381642139. The next prime is 381642167. The reversal of 381642149 is 941246183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381642149 - 2²⁰ = 380593573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381642109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461624 + ... + 462449.

It is an arithmetic number, because the mean of its divisors is an integer number (55444440).

Almost surely, 2^381642149 is an apocalyptic number.

It is an amenable number.

381642149 is a deficient number, since it is larger than the sum of its proper divisors (61913371).

381642149 is an equidigital number, since it uses as much as digits as its factorization.

381642149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924139.

The product of its digits is 41472, while the sum is 38.

The square root of 381642149 is about 19535.6635157345. The cubic root of 381642149 is about 725.3575083394.

The spelling of 381642149 in words is "three hundred eighty-one million, six hundred forty-two thousand, one hundred forty-nine".