382691421 has 18 divisors (see below), whose sum is σ = 643026462. Its totient is φ = 218680560.

The previous prime is 382691389. The next prime is 382691473. The reversal of 382691421 is 124196283.

It can be written as a sum of positive squares in only one way, i.e., 306740196 + 75951225 = 17514^2 + 8715^2 .

It is not a de Polignac number, because 382691421 - 2⁵ = 382691389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (382691821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 433450 + ... + 434331.

Almost surely, 2^382691421 is an apocalyptic number.

It is an amenable number.

382691421 is a deficient number, since it is larger than the sum of its proper divisors (260335041).

382691421 is a wasteful number, since it uses less digits than its factorization.

382691421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867801 (or 867791 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 382691421 is about 19562.5003769968. The cubic root of 382691421 is about 726.0216565723.

The spelling of 382691421 in words is "three hundred eighty-two million, six hundred ninety-one thousand, four hundred twenty-one".