139500361 has 16 divisors (see below), whose sum is σ = 187302528. Its totient is φ = 100339200.

The previous prime is 139500349. The next prime is 139500377. The reversal of 139500361 is 163005931.

It is not a de Polignac number, because 139500361 - 2⁷ = 139500233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139500311) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 68680 + ... + 70681.

It is an arithmetic number, because the mean of its divisors is an integer number (11706408).

Almost surely, 2^139500361 is an apocalyptic number.

139500361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139500361 is a deficient number, since it is larger than the sum of its proper divisors (47802167).

139500361 is a wasteful number, since it uses less digits than its factorization.

139500361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139392.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 139500361 is about 11811.0270933564. The cubic root of 139500361 is about 518.6309661367.

It can be divided in two parts, 139 and 500361, that added together give a triangular number (500500 = T₁₀₀₀).

The spelling of 139500361 in words is "one hundred thirty-nine million, five hundred thousand, three hundred sixty-one".