139298209 has 8 divisors (see below), whose sum is σ = 140400000. Its totient is φ = 138200832.

The previous prime is 139298179. The next prime is 139298227. The reversal of 139298209 is 902892931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139298209 - 2¹³ = 139290017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139298009) 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 in 7 ways as a sum of consecutive naturals, for example, 88572 + ... + 90130.

It is an arithmetic number, because the mean of its divisors is an integer number (17550000).

Almost surely, 2^139298209 is an apocalyptic number.

It is an amenable number.

139298209 is a deficient number, since it is larger than the sum of its proper divisors (1101791).

139298209 is a wasteful number, since it uses less digits than its factorization.

139298209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 139298209 is about 11802.4662253277. The cubic root of 139298209 is about 518.3803264730.

The spelling of 139298209 in words is "one hundred thirty-nine million, two hundred ninety-eight thousand, two hundred nine".