139018259 has 2 divisors, whose sum is σ = 139018260. Its totient is φ = 139018258.

The previous prime is 139018237. The next prime is 139018283. The reversal of 139018259 is 952810931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139018259 - 2¹² = 139014163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139018289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69509129 + 69509130.

It is an arithmetic number, because the mean of its divisors is an integer number (69509130).

Almost surely, 2^139018259 is an apocalyptic number.

139018259 is a deficient number, since it is larger than the sum of its proper divisors (1).

139018259 is an equidigital number, since it uses as much as digits as its factorization.

139018259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 139018259 is about 11790.6004512069. The cubic root of 139018259 is about 518.0328276329.

The spelling of 139018259 in words is "one hundred thirty-nine million, eighteen thousand, two hundred fifty-nine".