806495405 has 4 divisors (see below), whose sum is σ = 967794492. Its totient is φ = 645196320.

The previous prime is 806495387. The next prime is 806495449. The reversal of 806495405 is 504594608.

It is a happy number.

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 537961636 + 268533769 = 23194^2 + 16387^2 .

It is not a de Polignac number, because 806495405 - 2¹⁴ = 806479021 is a prime.

It is a super-2 number, since 2×806495405² = 1300869676572228050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80649536 + ... + 80649545.

It is an arithmetic number, because the mean of its divisors is an integer number (241948623).

Almost surely, 2^806495405 is an apocalyptic number.

It is an amenable number.

806495405 is a deficient number, since it is larger than the sum of its proper divisors (161299087).

806495405 is a wasteful number, since it uses less digits than its factorization.

806495405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161299086.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 806495405 is about 28398.8627413141. The cubic root of 806495405 is about 930.8234141871.

The spelling of 806495405 in words is "eight hundred six million, four hundred ninety-five thousand, four hundred five".