499109421 has 4 divisors (see below), whose sum is σ = 665479232. Its totient is φ = 332739612.

The previous prime is 499109417. The next prime is 499109431. The reversal of 499109421 is 124901994.

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.

It is not a de Polignac number, because 499109421 - 2² = 499109417 is a prime.

It is a super-2 number, since 2×499109421² = 498220428261910482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 499109421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499109411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83184901 + ... + 83184906.

It is an arithmetic number, because the mean of its divisors is an integer number (166369808).

Almost surely, 2^499109421 is an apocalyptic number.

It is an amenable number.

499109421 is a deficient number, since it is larger than the sum of its proper divisors (166369811).

499109421 is a wasteful number, since it uses less digits than its factorization.

499109421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166369810.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 499109421 is about 22340.7569477849. The cubic root of 499109421 is about 793.2290105782.

The spelling of 499109421 in words is "four hundred ninety-nine million, one hundred nine thousand, four hundred twenty-one".