499578381 has 16 divisors (see below), whose sum is σ = 779070400. Its totient is φ = 315522864.

The previous prime is 499578323. The next prime is 499578413. The reversal of 499578381 is 183875994.

499578381 is a `hidden beast` number, since 499 + 5 + 78 + 3 + 81 = 666.

It is not a de Polignac number, because 499578381 - 2⁷ = 499578253 is a prime.

It is a super-2 number, since 2×499578381² = 499157117525162322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499571381) 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 15 ways as a sum of consecutive naturals, for example, 486406 + ... + 487431.

It is an arithmetic number, because the mean of its divisors is an integer number (48691900).

Almost surely, 2^499578381 is an apocalyptic number.

It is an amenable number.

499578381 is a deficient number, since it is larger than the sum of its proper divisors (279492019).

499578381 is a wasteful number, since it uses less digits than its factorization.

499578381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973865 (or 973859 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 499578381 is about 22351.2500992674. The cubic root of 499578381 is about 793.4773704332.

The spelling of 499578381 in words is "four hundred ninety-nine million, five hundred seventy-eight thousand, three hundred eighty-one".