498509923 has 4 divisors (see below), whose sum is σ = 498936808. Its totient is φ = 498083040.

The previous prime is 498509911. The next prime is 498509941. The reversal of 498509923 is 329905894.

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

It is a cyclic number.

It is not a de Polignac number, because 498509923 - 2²¹ = 496412771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (498509903) 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, 211686 + ... + 214027.

It is an arithmetic number, because the mean of its divisors is an integer number (124734202).

Almost surely, 2^498509923 is an apocalyptic number.

498509923 is a deficient number, since it is larger than the sum of its proper divisors (426885).

498509923 is a wasteful number, since it uses less digits than its factorization.

498509923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426884.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 498509923 is about 22327.3357792639. The cubic root of 498509923 is about 792.9112915183.

The spelling of 498509923 in words is "four hundred ninety-eight million, five hundred nine thousand, nine hundred twenty-three".