139432849 has 8 divisors (see below), whose sum is σ = 146880000. Its totient is φ = 131996592.

The previous prime is 139432837. The next prime is 139432873. The reversal of 139432849 is 948234931.

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 139432849 - 2⁵ = 139432817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139432819) 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 7 ways as a sum of consecutive naturals, for example, 46992 + ... + 49870.

It is an arithmetic number, because the mean of its divisors is an integer number (18360000).

Almost surely, 2^139432849 is an apocalyptic number.

139432849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139432849 is a deficient number, since it is larger than the sum of its proper divisors (7447151).

139432849 is a wasteful number, since it uses less digits than its factorization.

139432849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447.

The product of its digits is 186624, while the sum is 43.

The square root of 139432849 is about 11808.1687403255. The cubic root of 139432849 is about 518.5472878260.

It can be divided in two parts, 1394 and 32849, that added together give a palindrome (34243).

The spelling of 139432849 in words is "one hundred thirty-nine million, four hundred thirty-two thousand, eight hundred forty-nine".