499381 has 4 divisors (see below), whose sum is σ = 500832. Its totient is φ = 497932.

The previous prime is 499363. The next prime is 499391. The reversal of 499381 is 183994.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 183994 = 2 ⋅91997.

It is a cyclic number.

It is not a de Polignac number, because 499381 - 2⁵ = 499349 is a prime.

It is a super-2 number, since 2×499381² = 498762766322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120 + ... + 1006.

It is an arithmetic number, because the mean of its divisors is an integer number (125208).

2⁴⁹⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

499381 is a deficient number, since it is larger than the sum of its proper divisors (1451).

499381 is an equidigital number, since it uses as much as digits as its factorization.

499381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450.

The product of its digits is 7776, while the sum is 34.

The square root of 499381 is about 706.6689465372. The cubic root of 499381 is about 79.3372856978.

The spelling of 499381 in words is "four hundred ninety-nine thousand, three hundred eighty-one".