121683239 has 4 divisors (see below), whose sum is σ = 128087640. Its totient is φ = 115278840.

The previous prime is 121683187. The next prime is 121683253. The reversal of 121683239 is 932386121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121683239 - 2²⁰ = 120634663 is a prime.

It is a super-2 number, since 2×121683239² = 29613621307062242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121683199 and 121683208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121683439) 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, 3202172 + ... + 3202209.

It is an arithmetic number, because the mean of its divisors is an integer number (32021910).

Almost surely, 2^121683239 is an apocalyptic number.

121683239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121683239 is a deficient number, since it is larger than the sum of its proper divisors (6404401).

121683239 is an equidigital number, since it uses as much as digits as its factorization.

121683239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404400.

The product of its digits is 15552, while the sum is 35.

The square root of 121683239 is about 11031.0126008449. The cubic root of 121683239 is about 495.5379506836.

The spelling of 121683239 in words is "one hundred twenty-one million, six hundred eighty-three thousand, two hundred thirty-nine".