121846399 has 4 divisors (see below), whose sum is σ = 125776960. Its totient is φ = 117915840.

The previous prime is 121846397. The next prime is 121846409. The reversal of 121846399 is 993648121.

It is a happy number.

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 121846399 - 2¹ = 121846397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121846393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965234 + ... + 1965295.

It is an arithmetic number, because the mean of its divisors is an integer number (31444240).

Almost surely, 2^121846399 is an apocalyptic number.

121846399 is a deficient number, since it is larger than the sum of its proper divisors (3930561).

121846399 is an equidigital number, since it uses as much as digits as its factorization.

121846399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930560.

The product of its digits is 93312, while the sum is 43.

The square root of 121846399 is about 11038.4056366850. The cubic root of 121846399 is about 495.7593338491.

The spelling of 121846399 in words is "one hundred twenty-one million, eight hundred forty-six thousand, three hundred ninety-nine".