139626239 has 2 divisors, whose sum is σ = 139626240. Its totient is φ = 139626238.

The previous prime is 139626199. The next prime is 139626281. The reversal of 139626239 is 932626931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139626239 - 2¹⁶ = 139560703 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 139626196 and 139626205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139626299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69813119 + 69813120.

It is an arithmetic number, because the mean of its divisors is an integer number (69813120).

Almost surely, 2^139626239 is an apocalyptic number.

139626239 is a deficient number, since it is larger than the sum of its proper divisors (1).

139626239 is an equidigital number, since it uses as much as digits as its factorization.

139626239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 139626239 is about 11816.3547255488. The cubic root of 139626239 is about 518.7869146034.

The spelling of 139626239 in words is "one hundred thirty-nine million, six hundred twenty-six thousand, two hundred thirty-nine".