475692809 has 8 divisors (see below), whose sum is σ = 477553320. Its totient is φ = 473837056.

The previous prime is 475692779. The next prime is 475692839. The reversal of 475692809 is 908296574.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (475692779) and next prime (475692839).

It can be written as a sum of positive squares in 4 ways, for example, as 31326409 + 444366400 = 5597^2 + 21080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475692809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (475692839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498677 + ... + 499629.

It is an arithmetic number, because the mean of its divisors is an integer number (59694165).

Almost surely, 2^475692809 is an apocalyptic number.

It is an amenable number.

475692809 is a deficient number, since it is larger than the sum of its proper divisors (1860511).

475692809 is an equidigital number, since it uses as much as digits as its factorization.

475692809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 475692809 is about 21810.3830548663. The cubic root of 475692809 is about 780.6245321400.

The spelling of 475692809 in words is "four hundred seventy-five million, six hundred ninety-two thousand, eight hundred nine".