461782381 has 4 divisors (see below), whose sum is σ = 464126652. Its totient is φ = 459438112.

The previous prime is 461782337. The next prime is 461782397. The reversal of 461782381 is 183287164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 226773481 + 235008900 = 15059^2 + 15330^2 .

It is a cyclic number.

It is not a de Polignac number, because 461782381 - 2⁷ = 461782253 is a prime.

It is a super-2 number, since 2×461782381² = 426485934804058322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461782331) 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 3 ways as a sum of consecutive naturals, for example, 1171840 + ... + 1172233.

It is an arithmetic number, because the mean of its divisors is an integer number (116031663).

Almost surely, 2^461782381 is an apocalyptic number.

It is an amenable number.

461782381 is a deficient number, since it is larger than the sum of its proper divisors (2344271).

461782381 is a wasteful number, since it uses less digits than its factorization.

461782381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344270.

The product of its digits is 64512, while the sum is 40.

The square root of 461782381 is about 21489.1223878501. The cubic root of 461782381 is about 772.9400060658.

The spelling of 461782381 in words is "four hundred sixty-one million, seven hundred eighty-two thousand, three hundred eighty-one".