284772139 has 2 divisors, whose sum is σ = 284772140. Its totient is φ = 284772138.

The previous prime is 284772119. The next prime is 284772157. The reversal of 284772139 is 931277482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 284772139 - 2¹¹ = 284770091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 284772095 and 284772104.

It is not a weakly prime, because it can be changed into another prime (284772109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142386069 + 142386070.

It is an arithmetic number, because the mean of its divisors is an integer number (142386070).

Almost surely, 2^284772139 is an apocalyptic number.

284772139 is a deficient number, since it is larger than the sum of its proper divisors (1).

284772139 is an equidigital number, since it uses as much as digits as its factorization.

284772139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 284772139 is about 16875.1930063037. The cubic root of 284772139 is about 657.9090075670.

The spelling of 284772139 in words is "two hundred eighty-four million, seven hundred seventy-two thousand, one hundred thirty-nine".