381923293 has 4 divisors (see below), whose sum is σ = 383733568. Its totient is φ = 380113020.

The previous prime is 381923273. The next prime is 381923299. The reversal of 381923293 is 392329183.

It is a happy number.

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: 392329183 = 16823 ⋅23321.

It is a cyclic number.

It is not a de Polignac number, because 381923293 - 2¹³ = 381915101 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 (381923299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904821 + ... + 905242.

It is an arithmetic number, because the mean of its divisors is an integer number (95933392).

Almost surely, 2^381923293 is an apocalyptic number.

It is an amenable number.

381923293 is a deficient number, since it is larger than the sum of its proper divisors (1810275).

381923293 is a wasteful number, since it uses less digits than its factorization.

381923293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810274.

The product of its digits is 69984, while the sum is 40.

The square root of 381923293 is about 19542.8578513993. The cubic root of 381923293 is about 725.5355807877.

The spelling of 381923293 in words is "three hundred eighty-one million, nine hundred twenty-three thousand, two hundred ninety-three".