9421961404729 has 8 divisors (see below), whose sum is σ = 9601223171400. Its totient is φ = 9242754782976.

The previous prime is 9421961404717. The next prime is 9421961404733. The reversal of 9421961404729 is 9274041691249.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4889064921129 + 4532896483600 = 2211123^2 + 2129060^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9421961404729 - 2¹¹ = 9421961402681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9421961404789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13441182 + ... + 14124775.

It is an arithmetic number, because the mean of its divisors is an integer number (1200152896425).

Almost surely, 2^{9421961404729} is an apocalyptic number.

It is an amenable number.

9421961404729 is a deficient number, since it is larger than the sum of its proper divisors (179261766671).

9421961404729 is a wasteful number, since it uses less digits than its factorization.

9421961404729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27572459.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 9421961404729 in words is "nine trillion, four hundred twenty-one billion, nine hundred sixty-one million, four hundred four thousand, seven hundred twenty-nine".