139343405 has 8 divisors (see below), whose sum is σ = 172978200. Its totient is φ = 107630656.

The previous prime is 139343401. The next prime is 139343411. The reversal of 139343405 is 504343931.

It can be written as a sum of positive squares in 4 ways, for example, as 9132484 + 130210921 = 3022^2 + 11411^2 .

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 139343405 - 2² = 139343401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139343401) 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 7 ways as a sum of consecutive naturals, for example, 480350 + ... + 480639.

It is an arithmetic number, because the mean of its divisors is an integer number (21622275).

Almost surely, 2^139343405 is an apocalyptic number.

It is an amenable number.

139343405 is a deficient number, since it is larger than the sum of its proper divisors (33634795).

139343405 is an equidigital number, since it uses as much as digits as its factorization.

139343405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961023.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 139343405 is about 11804.3807546182. The cubic root of 139343405 is about 518.4363841065.

The spelling of 139343405 in words is "one hundred thirty-nine million, three hundred forty-three thousand, four hundred five".