830143305 has 12 divisors (see below), whose sum is σ = 1438915140. Its totient is φ = 442743072.

The previous prime is 830143291. The next prime is 830143319. The reversal of 830143305 is 503341038.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (830143291) and next prime (830143319).

It can be written as a sum of positive squares in 2 ways, for example, as 324972729 + 505170576 = 18027^2 + 22476^2 .

It is not a de Polignac number, because 830143305 - 2⁷ = 830143177 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9223770 + ... + 9223859.

It is an arithmetic number, because the mean of its divisors is an integer number (119909595).

Almost surely, 2^830143305 is an apocalyptic number.

It is an amenable number.

830143305 is a deficient number, since it is larger than the sum of its proper divisors (608771835).

830143305 is a wasteful number, since it uses less digits than its factorization.

830143305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18447640 (or 18447637 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 830143305 is about 28812.2075690149. The cubic root of 830143305 is about 939.8337207768.

The spelling of 830143305 in words is "eight hundred thirty million, one hundred forty-three thousand, three hundred five".