139281849 has 40 divisors (see below), whose sum is σ = 241744448. Its totient is φ = 78265440.

The previous prime is 139281823. The next prime is 139281893. The reversal of 139281849 is 948182931.

It is not a de Polignac number, because 139281849 - 2¹⁷ = 139150777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139282849) 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 39 ways as a sum of consecutive naturals, for example, 32574 + ... + 36600.

Almost surely, 2^139281849 is an apocalyptic number.

It is an amenable number.

139281849 is a deficient number, since it is larger than the sum of its proper divisors (102462599).

139281849 is an equidigital number, since it uses as much as digits as its factorization.

139281849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107 (or 4098 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 139281849 is about 11801.7731294920. The cubic root of 139281849 is about 518.3600318015.

The spelling of 139281849 in words is "one hundred thirty-nine million, two hundred eighty-one thousand, eight hundred forty-nine".