139013205 has 32 divisors (see below), whose sum is σ = 227902080. Its totient is φ = 72334080.

The previous prime is 139013111. The next prime is 139013213. The reversal of 139013205 is 502310931.

It is a happy number.

It is not a de Polignac number, because 139013205 - 2¹⁴ = 138996821 is a prime.

It is a super-4 number, since 4×139013205⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126639 + ... + 127731.

It is an arithmetic number, because the mean of its divisors is an integer number (7121940).

Almost surely, 2^139013205 is an apocalyptic number.

139013205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139013205 is a deficient number, since it is larger than the sum of its proper divisors (88888875).

139013205 is a wasteful number, since it uses less digits than its factorization.

139013205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 139013205 is about 11790.3861259927. The cubic root of 139013205 is about 518.0265498733.

The spelling of 139013205 in words is "one hundred thirty-nine million, thirteen thousand, two hundred five".