139899349 has 4 divisors (see below), whose sum is σ = 139935564. Its totient is φ = 139863136.

The previous prime is 139899343. The next prime is 139899371. The reversal of 139899349 is 943998931.

139899349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99640324 + 40259025 = 9982^2 + 6345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139899349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139899349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139899343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11512 + ... + 20305.

It is an arithmetic number, because the mean of its divisors is an integer number (34983891).

Almost surely, 2^139899349 is an apocalyptic number.

It is an amenable number.

139899349 is a deficient number, since it is larger than the sum of its proper divisors (36215).

139899349 is an equidigital number, since it uses as much as digits as its factorization.

139899349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36214.

The product of its digits is 1889568, while the sum is 55.

The square root of 139899349 is about 11827.9055204208. The cubic root of 139899349 is about 519.1249447042.

The spelling of 139899349 in words is "one hundred thirty-nine million, eight hundred ninety-nine thousand, three hundred forty-nine".