121194839 has 2 divisors, whose sum is σ = 121194840. Its totient is φ = 121194838.

The previous prime is 121194833. The next prime is 121194851. The reversal of 121194839 is 938491121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121194839 - 2⁴ = 121194823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121194833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60597419 + 60597420.

It is an arithmetic number, because the mean of its divisors is an integer number (60597420).

Almost surely, 2^121194839 is an apocalyptic number.

121194839 is a deficient number, since it is larger than the sum of its proper divisors (1).

121194839 is an equidigital number, since it uses as much as digits as its factorization.

121194839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 121194839 is about 11008.8527558506. The cubic root of 121194839 is about 494.8740814973.

The spelling of 121194839 in words is "one hundred twenty-one million, one hundred ninety-four thousand, eight hundred thirty-nine".