121793409 has 8 divisors (see below), whose sum is σ = 180434720. Its totient is φ = 81195588.

The previous prime is 121793407. The next prime is 121793443. The reversal of 121793409 is 904397121.

It is not a de Polignac number, because 121793409 - 2¹ = 121793407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121793407) 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, 2255407 + ... + 2255460.

It is an arithmetic number, because the mean of its divisors is an integer number (22554340).

Almost surely, 2^121793409 is an apocalyptic number.

It is an amenable number.

121793409 is a deficient number, since it is larger than the sum of its proper divisors (58641311).

121793409 is an equidigital number, since it uses as much as digits as its factorization.

121793409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510876 (or 4510870 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 121793409 is about 11036.0051196074. The cubic root of 121793409 is about 495.6874562051.

The spelling of 121793409 in words is "one hundred twenty-one million, seven hundred ninety-three thousand, four hundred nine".