232406921 has 4 divisors (see below), whose sum is σ = 232655892. Its totient is φ = 232157952.

The previous prime is 232406903. The next prime is 232406947. The reversal of 232406921 is 129604232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128142400 + 104264521 = 11320^2 + 10211^2 .

It is a cyclic number.

It is not a de Polignac number, because 232406921 - 2¹⁸ = 232144777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232406971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123080 + ... + 124953.

It is an arithmetic number, because the mean of its divisors is an integer number (58163973).

Almost surely, 2^232406921 is an apocalyptic number.

It is an amenable number.

232406921 is a deficient number, since it is larger than the sum of its proper divisors (248971).

232406921 is an equidigital number, since it uses as much as digits as its factorization.

232406921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248970.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 232406921 is about 15244.8981957900. The cubic root of 232406921 is about 614.8224053712.

The spelling of 232406921 in words is "two hundred thirty-two million, four hundred six thousand, nine hundred twenty-one".