231628933 has 2 divisors, whose sum is σ = 231628934. Its totient is φ = 231628932.

The previous prime is 231628907. The next prime is 231628937. The reversal of 231628933 is 339826132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166874724 + 64754209 = 12918^2 + 8047^2 .

It is a cyclic number.

It is not a de Polignac number, because 231628933 - 2⁹ = 231628421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231628892 and 231628901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231628937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115814466 + 115814467.

It is an arithmetic number, because the mean of its divisors is an integer number (115814467).

Almost surely, 2^231628933 is an apocalyptic number.

It is an amenable number.

231628933 is a deficient number, since it is larger than the sum of its proper divisors (1).

231628933 is an equidigital number, since it uses as much as digits as its factorization.

231628933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 231628933 is about 15219.3604661957. The cubic root of 231628933 is about 614.1355939506.

The spelling of 231628933 in words is "two hundred thirty-one million, six hundred twenty-eight thousand, nine hundred thirty-three".