801895205 has 4 divisors (see below), whose sum is σ = 962274252. Its totient is φ = 641516160.

The previous prime is 801895201. The next prime is 801895243. The reversal of 801895205 is 502598108.

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 313750369 + 488144836 = 17713^2 + 22094^2 .

It is not a de Polignac number, because 801895205 - 2² = 801895201 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 (801895201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80189516 + ... + 80189525.

It is an arithmetic number, because the mean of its divisors is an integer number (240568563).

Almost surely, 2^801895205 is an apocalyptic number.

It is an amenable number.

801895205 is a deficient number, since it is larger than the sum of its proper divisors (160379047).

801895205 is a wasteful number, since it uses less digits than its factorization.

801895205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160379046.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 801895205 is about 28317.7542365209. The cubic root of 801895205 is about 929.0502521363.

The spelling of 801895205 in words is "eight hundred one million, eight hundred ninety-five thousand, two hundred five".