830709805 has 4 divisors (see below), whose sum is σ = 996851772. Its totient is φ = 664567840.

The previous prime is 830709799. The next prime is 830709809. The reversal of 830709805 is 508907038.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508907038 = 2 ⋅254453519.

It can be written as a sum of positive squares in 2 ways, for example, as 224220676 + 606489129 = 14974^2 + 24627^2 .

It is not a de Polignac number, because 830709805 - 2⁹ = 830709293 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (830709809) 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, 83070976 + ... + 83070985.

It is an arithmetic number, because the mean of its divisors is an integer number (249212943).

Almost surely, 2^830709805 is an apocalyptic number.

It is an amenable number.

830709805 is a deficient number, since it is larger than the sum of its proper divisors (166141967).

830709805 is a wasteful number, since it uses less digits than its factorization.

830709805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166141966.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 830709805 is about 28822.0367947860. The cubic root of 830709805 is about 940.0474568616.

The spelling of 830709805 in words is "eight hundred thirty million, seven hundred nine thousand, eight hundred five".