329785601 has 4 divisors (see below), whose sum is σ = 349184772. Its totient is φ = 310386432.

The previous prime is 329785571. The next prime is 329785609. The reversal of 329785601 is 106587923.

It is a Cunningham number, because it is equal to 18160²+1.

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 256768576 + 73017025 = 16024^2 + 8545^2 .

It is a cyclic number.

It is not a de Polignac number, because 329785601 - 2⁶ = 329785537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (329785609) 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, 9699560 + ... + 9699593.

It is an arithmetic number, because the mean of its divisors is an integer number (87296193).

Almost surely, 2^329785601 is an apocalyptic number.

It is an amenable number.

329785601 is a deficient number, since it is larger than the sum of its proper divisors (19399171).

329785601 is a wasteful number, since it uses less digits than its factorization.

329785601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19399170.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 329785601 is about 18160.0000275330. Note that the first 4 decimals coincide. The cubic root of 329785601 is about 690.8926352430.

The spelling of 329785601 in words is "three hundred twenty-nine million, seven hundred eighty-five thousand, six hundred one".