139533605 has 8 divisors (see below), whose sum is σ = 167538552. Its totient is φ = 111561408.

The previous prime is 139533599. The next prime is 139533613. The reversal of 139533605 is 506335931.

It can be written as a sum of positive squares in 4 ways, for example, as 22591009 + 116942596 = 4753^2 + 10814^2 .

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 139533605 - 2²² = 135339301 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 2447 + ... + 16883.

It is an arithmetic number, because the mean of its divisors is an integer number (20942319).

Almost surely, 2^139533605 is an apocalyptic number.

It is an amenable number.

139533605 is a deficient number, since it is larger than the sum of its proper divisors (28004947).

139533605 is a wasteful number, since it uses less digits than its factorization.

139533605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16375.

The product of its (nonzero) digits is 36450, while the sum is 35.

The square root of 139533605 is about 11812.4343384418. The cubic root of 139533605 is about 518.6721607695.

The spelling of 139533605 in words is "one hundred thirty-nine million, five hundred thirty-three thousand, six hundred five".