495190309 has 4 divisors (see below), whose sum is σ = 495235404. Its totient is φ = 495145216.

The previous prime is 495190303. The next prime is 495190313. The reversal of 495190309 is 903091594.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 444282084 + 50908225 = 21078^2 + 7135^2 .

It is a cyclic number.

It is not a de Polignac number, because 495190309 - 2³ = 495190301 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 (495190301) 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, 5829 + ... + 32005.

It is an arithmetic number, because the mean of its divisors is an integer number (123808851).

Almost surely, 2^495190309 is an apocalyptic number.

It is an amenable number.

495190309 is a deficient number, since it is larger than the sum of its proper divisors (45095).

495190309 is a wasteful number, since it uses less digits than its factorization.

495190309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45094.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 495190309 is about 22252.8719270120. The cubic root of 495190309 is about 791.1473522304.

The spelling of 495190309 in words is "four hundred ninety-five million, one hundred ninety thousand, three hundred nine".