495359021 has 4 divisors (see below), whose sum is σ = 498514332. Its totient is φ = 492203712.

The previous prime is 495359009. The next prime is 495359069. The reversal of 495359021 is 120953594.

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

It can be written as a sum of positive squares in 2 ways, for example, as 232562500 + 262796521 = 15250^2 + 16211^2 .

It is a cyclic number.

It is not a de Polignac number, because 495359021 - 2¹⁰ = 495357997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495350021) 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, 1577420 + ... + 1577733.

It is an arithmetic number, because the mean of its divisors is an integer number (124628583).

Almost surely, 2^495359021 is an apocalyptic number.

It is an amenable number.

495359021 is a deficient number, since it is larger than the sum of its proper divisors (3155311).

495359021 is a wasteful number, since it uses less digits than its factorization.

495359021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155310.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 495359021 is about 22256.6623957861. The cubic root of 495359021 is about 791.2371903486.

The spelling of 495359021 in words is "four hundred ninety-five million, three hundred fifty-nine thousand, twenty-one".