139385349 has 18 divisors (see below), whose sum is σ = 212493606. Its totient is φ = 88030800.

The previous prime is 139385347. The next prime is 139385357. The reversal of 139385349 is 943583931.

It can be written as a sum of positive squares in only one way, i.e., 131262849 + 8122500 = 11457^2 + 2850^2 .

It is not a de Polignac number, because 139385349 - 2¹ = 139385347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139385341) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18202 + ... + 24699.

Almost surely, 2^139385349 is an apocalyptic number.

139385349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139385349 is a deficient number, since it is larger than the sum of its proper divisors (73108257).

139385349 is a wasteful number, since it uses less digits than its factorization.

139385349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42945 (or 42923 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 139385349 is about 11806.1572495033. The cubic root of 139385349 is about 518.4883973664.

The spelling of 139385349 in words is "one hundred thirty-nine million, three hundred eighty-five thousand, three hundred forty-nine".