84780329 has 4 divisors (see below), whose sum is σ = 85210884. Its totient is φ = 84349776.

The previous prime is 84780313. The next prime is 84780331. The reversal of 84780329 is 92308748.

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 69973225 + 14807104 = 8365^2 + 3848^2 .

It is a cyclic number.

It is not a de Polignac number, because 84780329 - 2⁴ = 84780313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84780349) 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, 214982 + ... + 215375.

It is an arithmetic number, because the mean of its divisors is an integer number (21302721).

Almost surely, 2^84780329 is an apocalyptic number.

It is an amenable number.

84780329 is a deficient number, since it is larger than the sum of its proper divisors (430555).

84780329 is a wasteful number, since it uses less digits than its factorization.

84780329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430554.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 84780329 is about 9207.6234175818. The cubic root of 84780329 is about 439.3038734084.

The spelling of 84780329 in words is "eighty-four million, seven hundred eighty thousand, three hundred twenty-nine".