239613421 has 2 divisors, whose sum is σ = 239613422. Its totient is φ = 239613420.

The previous prime is 239613397. The next prime is 239613431. The reversal of 239613421 is 124316932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170955625 + 68657796 = 13075^2 + 8286^2 .

It is a cyclic number.

It is not a de Polignac number, because 239613421 - 2¹¹ = 239611373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239613431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119806710 + 119806711.

It is an arithmetic number, because the mean of its divisors is an integer number (119806711).

Almost surely, 2^239613421 is an apocalyptic number.

It is an amenable number.

239613421 is a deficient number, since it is larger than the sum of its proper divisors (1).

239613421 is an equidigital number, since it uses as much as digits as its factorization.

239613421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 239613421 is about 15479.4515729725. The cubic root of 239613421 is about 621.1126577601.

The spelling of 239613421 in words is "two hundred thirty-nine million, six hundred thirteen thousand, four hundred twenty-one".