231628477 has 2 divisors, whose sum is σ = 231628478. Its totient is φ = 231628476.

The previous prime is 231628471. The next prime is 231628493. The reversal of 231628477 is 774826132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176066361 + 55562116 = 13269^2 + 7454^2 .

It is a cyclic number.

It is not a de Polignac number, because 231628477 - 2¹¹ = 231626429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231628471) 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 as a sum of consecutive naturals, namely, 115814238 + 115814239.

It is an arithmetic number, because the mean of its divisors is an integer number (115814239).

Almost surely, 2^231628477 is an apocalyptic number.

It is an amenable number.

231628477 is a deficient number, since it is larger than the sum of its proper divisors (1).

231628477 is an equidigital number, since it uses as much as digits as its factorization.

231628477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 231628477 is about 15219.3454852697. The cubic root of 231628477 is about 614.1351909411.

The spelling of 231628477 in words is "two hundred thirty-one million, six hundred twenty-eight thousand, four hundred seventy-seven".