839688121 has 8 divisors (see below), whose sum is σ = 854600544. Its totient is φ = 824868000.

The previous prime is 839688107. The next prime is 839688131. The reversal of 839688121 is 121886938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 839688121 - 2⁷ = 839687993 is a prime.

It is a super-2 number, since 2×839688121² = 1410152281097021282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (839688131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4591 + ... + 41236.

It is an arithmetic number, because the mean of its divisors is an integer number (106825068).

Almost surely, 2^839688121 is an apocalyptic number.

It is an amenable number.

839688121 is a deficient number, since it is larger than the sum of its proper divisors (14912423).

839688121 is a wasteful number, since it uses less digits than its factorization.

839688121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46151.

The product of its digits is 165888, while the sum is 46.

The square root of 839688121 is about 28977.3725689546. The cubic root of 839688121 is about 943.4220078240.

The spelling of 839688121 in words is "eight hundred thirty-nine million, six hundred eighty-eight thousand, one hundred twenty-one".