121789473 has 32 divisors (see below), whose sum is σ = 182044800. Its totient is φ = 71909376.

The previous prime is 121789457. The next prime is 121789501. The reversal of 121789473 is 374987121.

It is not a de Polignac number, because 121789473 - 2⁴ = 121789457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121789403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290458 + ... + 290876.

It is an arithmetic number, because the mean of its divisors is an integer number (5688900).

Almost surely, 2^121789473 is an apocalyptic number.

121789473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121789473 is a deficient number, since it is larger than the sum of its proper divisors (60255327).

121789473 is a wasteful number, since it uses less digits than its factorization.

121789473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721.

The product of its digits is 84672, while the sum is 42.

The square root of 121789473 is about 11035.8267927691. The cubic root of 121789473 is about 495.6821164339.

The spelling of 121789473 in words is "one hundred twenty-one million, seven hundred eighty-nine thousand, four hundred seventy-three".