139605851 has 12 divisors (see below), whose sum is σ = 177162840. Its totient is φ = 108783360.

The previous prime is 139605841. The next prime is 139605871. The reversal of 139605851 is 158506931.

139605851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139605851 - 2¹⁰ = 139604827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139605841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128966 + ... + 130043.

It is an arithmetic number, because the mean of its divisors is an integer number (14763570).

Almost surely, 2^139605851 is an apocalyptic number.

139605851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139605851 is a deficient number, since it is larger than the sum of its proper divisors (37556989).

139605851 is a wasteful number, since it uses less digits than its factorization.

139605851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259034 (or 259027 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 139605851 is about 11815.4919914492. The cubic root of 139605851 is about 518.7616625626.

The spelling of 139605851 in words is "one hundred thirty-nine million, six hundred five thousand, eight hundred fifty-one".