381774871 has 4 divisors (see below), whose sum is σ = 381884152. Its totient is φ = 381665592.

The previous prime is 381774863. The next prime is 381774893. The reversal of 381774871 is 178477183.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178477183 = 59 ⋅3025037.

It is a cyclic number.

It is not a de Polignac number, because 381774871 - 2³ = 381774863 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 (381774671) 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, 49221 + ... + 56446.

It is an arithmetic number, because the mean of its divisors is an integer number (95471038).

Almost surely, 2^381774871 is an apocalyptic number.

381774871 is a deficient number, since it is larger than the sum of its proper divisors (109281).

381774871 is a wasteful number, since it uses less digits than its factorization.

381774871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109280.

The product of its digits is 263424, while the sum is 46.

The square root of 381774871 is about 19539.0601360454. The cubic root of 381774871 is about 725.4415833835.

The spelling of 381774871 in words is "three hundred eighty-one million, seven hundred seventy-four thousand, eight hundred seventy-one".