121692439 has 8 divisors (see below), whose sum is σ = 137333520. Its totient is φ = 106814400.

The previous prime is 121692421. The next prime is 121692449. The reversal of 121692439 is 934296121.

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

It is not a de Polignac number, because 121692439 - 2¹³ = 121684247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121692398 and 121692407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121692449) 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, 190422 + ... + 191059.

It is an arithmetic number, because the mean of its divisors is an integer number (17166690).

Almost surely, 2^121692439 is an apocalyptic number.

121692439 is a deficient number, since it is larger than the sum of its proper divisors (15641081).

121692439 is a wasteful number, since it uses less digits than its factorization.

121692439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381521.

The product of its digits is 23328, while the sum is 37.

The square root of 121692439 is about 11031.4295991046. The cubic root of 121692439 is about 495.5504389395.

The spelling of 121692439 in words is "one hundred twenty-one million, six hundred ninety-two thousand, four hundred thirty-nine".