139279689 has 16 divisors (see below), whose sum is σ = 206712000. Its totient is φ = 92685888.

The previous prime is 139279669. The next prime is 139279703. The reversal of 139279689 is 986972931.

It is not a de Polignac number, because 139279689 - 2¹⁷ = 139148617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139279669) 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 in 15 ways as a sum of consecutive naturals, for example, 11662 + ... + 20360.

It is an arithmetic number, because the mean of its divisors is an integer number (12919500).

Almost surely, 2^139279689 is an apocalyptic number.

It is an amenable number.

139279689 is a deficient number, since it is larger than the sum of its proper divisors (67432311).

139279689 is an equidigital number, since it uses as much as digits as its factorization.

139279689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9301 (or 9295 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 139279689 is about 11801.6816174645. The cubic root of 139279689 is about 518.3573521907.

The spelling of 139279689 in words is "one hundred thirty-nine million, two hundred seventy-nine thousand, six hundred eighty-nine".