823261121 has 4 divisors (see below), whose sum is σ = 823445952. Its totient is φ = 823076292.

The previous prime is 823261097. The next prime is 823261163. The reversal of 823261121 is 121162328.

823261121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 823261121 - 2¹⁸ = 822998977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (823261921) 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, 85565 + ... + 94698.

It is an arithmetic number, because the mean of its divisors is an integer number (205861488).

Almost surely, 2^823261121 is an apocalyptic number.

It is an amenable number.

823261121 is a deficient number, since it is larger than the sum of its proper divisors (184831).

823261121 is a wasteful number, since it uses less digits than its factorization.

823261121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184830.

The product of its digits is 1152, while the sum is 26.

The square root of 823261121 is about 28692.5272675657. The cubic root of 823261121 is about 937.2293247855.

The spelling of 823261121 in words is "eight hundred twenty-three million, two hundred sixty-one thousand, one hundred twenty-one".