9404656121 has 4 divisors (see below), whose sum is σ = 10748178432. Its totient is φ = 8061133812.

The previous prime is 9404656111. The next prime is 9404656127. The reversal of 9404656121 is 1216564049.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9404656121 - 2⁶ = 9404656057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9404656127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671761145 + ... + 671761158.

It is an arithmetic number, because the mean of its divisors is an integer number (2687044608).

Almost surely, 2^9404656121 is an apocalyptic number.

It is an amenable number.

9404656121 is a deficient number, since it is larger than the sum of its proper divisors (1343522311).

9404656121 is a wasteful number, since it uses less digits than its factorization.

9404656121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343522310.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 9404656121 is about 96977.6062861937. The cubic root of 9404656121 is about 2110.8026955023.

The spelling of 9404656121 in words is "nine billion, four hundred four million, six hundred fifty-six thousand, one hundred twenty-one".