809036146 has 4 divisors (see below), whose sum is σ = 1213554222. Its totient is φ = 404518072.

The previous prime is 809036141. The next prime is 809036147. The reversal of 809036146 is 641630908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 633075921 + 175960225 = 25161^2 + 13265^2 .

It is not an unprimeable number, because it can be changed into a prime (809036141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202259035 + ... + 202259038.

Almost surely, 2^809036146 is an apocalyptic number.

809036146 is a deficient number, since it is larger than the sum of its proper divisors (404518076).

809036146 is a wasteful number, since it uses less digits than its factorization.

809036146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404518075.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 809036146 is about 28443.5607124003. The cubic root of 809036146 is about 931.7998620092.

The spelling of 809036146 in words is "eight hundred nine million, thirty-six thousand, one hundred forty-six".