680832121 has 4 divisors (see below), whose sum is σ = 681015412. Its totient is φ = 680648832.

The previous prime is 680832109. The next prime is 680832143. The reversal of 680832121 is 121238086.

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 197711721 + 483120400 = 14061^2 + 21980^2 .

It is a cyclic number.

It is not a de Polignac number, because 680832121 - 2¹³ = 680823929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680832221) 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, 85956 + ... + 93541.

It is an arithmetic number, because the mean of its divisors is an integer number (170253853).

Almost surely, 2^680832121 is an apocalyptic number.

It is an amenable number.

680832121 is a deficient number, since it is larger than the sum of its proper divisors (183291).

680832121 is a wasteful number, since it uses less digits than its factorization.

680832121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183290.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 680832121 is about 26092.7599345106. The cubic root of 680832121 is about 879.7244837382.

The spelling of 680832121 in words is "six hundred eighty million, eight hundred thirty-two thousand, one hundred twenty-one".