121139793 has 10 divisors (see below), whose sum is σ = 180962034. Its totient is φ = 80759808.

The previous prime is 121139791. The next prime is 121139849. The reversal of 121139793 is 397931121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 112211649 + 8928144 = 10593^2 + 2988^2 .

It is not a de Polignac number, because 121139793 - 2¹ = 121139791 is a prime.

It is a super-3 number, since 3×121139793³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121139791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 747696 + ... + 747857.

Almost surely, 2^121139793 is an apocalyptic number.

It is an amenable number.

121139793 is a deficient number, since it is larger than the sum of its proper divisors (59822241).

121139793 is an equidigital number, since it uses as much as digits as its factorization.

121139793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495565 (or 1495556 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 121139793 is about 11006.3523930501. The cubic root of 121139793 is about 494.7991471624.

The spelling of 121139793 in words is "one hundred twenty-one million, one hundred thirty-nine thousand, seven hundred ninety-three".