675505409 has 4 divisors (see below), whose sum is σ = 675648960. Its totient is φ = 675361860.

The previous prime is 675505403. The next prime is 675505417. The reversal of 675505409 is 904505576.

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 675505409 - 2⁴ = 675505393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675505403) 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, 64469 + ... + 74210.

It is an arithmetic number, because the mean of its divisors is an integer number (168912240).

Almost surely, 2^675505409 is an apocalyptic number.

It is an amenable number.

675505409 is a deficient number, since it is larger than the sum of its proper divisors (143551).

675505409 is a wasteful number, since it uses less digits than its factorization.

675505409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143550.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 675505409 is about 25990.4868942465. The cubic root of 675505409 is about 877.4242038627.

The spelling of 675505409 in words is "six hundred seventy-five million, five hundred five thousand, four hundred nine".