381742381 has 4 divisors (see below), whose sum is σ = 383875200. Its totient is φ = 379609564.

The previous prime is 381742369. The next prime is 381742409. The reversal of 381742381 is 183247183.

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, and also an emirpimes, since its reverse is a distinct semiprime: 183247183 = 7 ⋅26178169.

It is a cyclic number.

It is not a de Polignac number, because 381742381 - 2²¹ = 379645229 is a prime.

It is a super-2 number, since 2×381742381² = 291454490903098322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381742381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381742301) 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, 1066141 + ... + 1066498.

It is an arithmetic number, because the mean of its divisors is an integer number (95968800).

Almost surely, 2^381742381 is an apocalyptic number.

It is an amenable number.

381742381 is a deficient number, since it is larger than the sum of its proper divisors (2132819).

381742381 is a wasteful number, since it uses less digits than its factorization.

381742381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132818.

The product of its digits is 32256, while the sum is 37.

The square root of 381742381 is about 19538.2287068199. The cubic root of 381742381 is about 725.4210038330.

The spelling of 381742381 in words is "three hundred eighty-one million, seven hundred forty-two thousand, three hundred eighty-one".