538249639 has 2 divisors, whose sum is σ = 538249640. Its totient is φ = 538249638.

The previous prime is 538249637. The next prime is 538249643. The reversal of 538249639 is 936942835.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 538249639 - 2¹ = 538249637 is a prime.

Together with 538249637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 538249592 and 538249601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538249633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269124819 + 269124820.

It is an arithmetic number, because the mean of its divisors is an integer number (269124820).

Almost surely, 2^538249639 is an apocalyptic number.

538249639 is a deficient number, since it is larger than the sum of its proper divisors (1).

538249639 is an equidigital number, since it uses as much as digits as its factorization.

538249639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 49.

The square root of 538249639 is about 23200.2077361389. The cubic root of 538249639 is about 813.4444787678. Note that the first 4 decimals are identical.

The spelling of 538249639 in words is "five hundred thirty-eight million, two hundred forty-nine thousand, six hundred thirty-nine".