139045579 has 2 divisors, whose sum is σ = 139045580. Its totient is φ = 139045578.

The previous prime is 139045573. The next prime is 139045597. The reversal of 139045579 is 975540931.

Together with next prime (139045597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139045579 is a prime.

It is not a weakly prime, because it can be changed into another prime (139045573) 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, 69522789 + 69522790.

It is an arithmetic number, because the mean of its divisors is an integer number (69522790).

Almost surely, 2^139045579 is an apocalyptic number.

139045579 is a deficient number, since it is larger than the sum of its proper divisors (1).

139045579 is an equidigital number, since it uses as much as digits as its factorization.

139045579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 139045579 is about 11791.7589442797. The cubic root of 139045579 is about 518.0667601776.

The spelling of 139045579 in words is "one hundred thirty-nine million, forty-five thousand, five hundred seventy-nine".