9828121461 has 4 divisors (see below), whose sum is σ = 13104161952. Its totient is φ = 6552080972.

The previous prime is 9828121453. The next prime is 9828121477. The reversal of 9828121461 is 1641218289.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1641218289 = 3 ⋅547072763.

It is a cyclic number.

It is not a de Polignac number, because 9828121461 - 2³ = 9828121453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9828121451) 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 3 ways as a sum of consecutive naturals, for example, 1638020241 + ... + 1638020246.

It is an arithmetic number, because the mean of its divisors is an integer number (3276040488).

Almost surely, 2^9828121461 is an apocalyptic number.

It is an amenable number.

9828121461 is a deficient number, since it is larger than the sum of its proper divisors (3276040491).

9828121461 is a wasteful number, since it uses less digits than its factorization.

9828121461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276040490.

The product of its digits is 55296, while the sum is 42.

The square root of 9828121461 is about 99136.8824454350. The cubic root of 9828121461 is about 2142.0199186756.

The spelling of 9828121461 in words is "nine billion, eight hundred twenty-eight million, one hundred twenty-one thousand, four hundred sixty-one".