139949208 has 80 divisors (see below), whose sum is σ = 448000080. Its totient is φ = 39984192.

The previous prime is 139949197. The next prime is 139949209. The reversal of 139949208 is 802949931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139949209) 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 19 ways as a sum of consecutive naturals, for example, 10891 + ... + 19962.

It is an arithmetic number, because the mean of its divisors is an integer number (5600001).

Almost surely, 2^139949208 is an apocalyptic number.

139949208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

139949208 is an abundant number, since it is smaller than the sum of its proper divisors (308050872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139949208 is a wasteful number, since it uses less digits than its factorization.

139949208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30878 (or 30865 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 139949208 is about 11830.0130177443. The cubic root of 139949208 is about 519.1866080276.

The spelling of 139949208 in words is "one hundred thirty-nine million, nine hundred forty-nine thousand, two hundred eight".