499823621 has 4 divisors (see below), whose sum is σ = 545262144. Its totient is φ = 454385100.

The previous prime is 499823617. The next prime is 499823641. The reversal of 499823621 is 126328994.

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 a cyclic number.

It is not a de Polignac number, because 499823621 - 2² = 499823617 is a prime.

It is a super-3 number, since 3×499823621³ (a number of 27 digits) contains 333 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 (499823641) 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, 22719245 + ... + 22719266.

It is an arithmetic number, because the mean of its divisors is an integer number (136315536).

Almost surely, 2^499823621 is an apocalyptic number.

It is an amenable number.

499823621 is a deficient number, since it is larger than the sum of its proper divisors (45438523).

499823621 is a wasteful number, since it uses less digits than its factorization.

499823621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45438522.

The product of its digits is 186624, while the sum is 44.

The square root of 499823621 is about 22356.7354727831. The cubic root of 499823621 is about 793.6071869378.

The spelling of 499823621 in words is "four hundred ninety-nine million, eight hundred twenty-three thousand, six hundred twenty-one".