239628709 has 2 divisors, whose sum is σ = 239628710. Its totient is φ = 239628708.

The previous prime is 239628689. The next prime is 239628713. The reversal of 239628709 is 907826932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203062500 + 36566209 = 14250^2 + 6047^2 .

It is a cyclic number.

It is not a de Polignac number, because 239628709 - 2⁷ = 239628581 is a prime.

It is a super-3 number, since 3×239628709³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239620709) 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, 119814354 + 119814355.

It is an arithmetic number, because the mean of its divisors is an integer number (119814355).

Almost surely, 2^239628709 is an apocalyptic number.

It is an amenable number.

239628709 is a deficient number, since it is larger than the sum of its proper divisors (1).

239628709 is an equidigital number, since it uses as much as digits as its factorization.

239628709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 239628709 is about 15479.9453810406. The cubic root of 239628709 is about 621.1258670485.

The spelling of 239628709 in words is "two hundred thirty-nine million, six hundred twenty-eight thousand, seven hundred nine".