381691023 has 16 divisors (see below), whose sum is σ = 587623680. Its totient is φ = 215859456.

The previous prime is 381690997. The next prime is 381691031. The reversal of 381691023 is 320196183.

It is not a de Polignac number, because 381691023 - 2¹⁰ = 381689999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381691043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91653 + ... + 95726.

It is an arithmetic number, because the mean of its divisors is an integer number (36726480).

Almost surely, 2^381691023 is an apocalyptic number.

381691023 is a deficient number, since it is larger than the sum of its proper divisors (205932657).

381691023 is a wasteful number, since it uses less digits than its factorization.

381691023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187486.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 381691023 is about 19536.9143674225. The cubic root of 381691023 is about 725.3884706862.

The spelling of 381691023 in words is "three hundred eighty-one million, six hundred ninety-one thousand, twenty-three".