139301405 has 4 divisors (see below), whose sum is σ = 167161692. Its totient is φ = 111441120.

The previous prime is 139301399. The next prime is 139301431. The reversal of 139301405 is 504103931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72012196 + 67289209 = 8486^2 + 8203^2 .

It is not a de Polignac number, because 139301405 - 2⁶ = 139301341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13930136 + ... + 13930145.

It is an arithmetic number, because the mean of its divisors is an integer number (41790423).

Almost surely, 2^139301405 is an apocalyptic number.

It is an amenable number.

139301405 is a deficient number, since it is larger than the sum of its proper divisors (27860287).

139301405 is an equidigital number, since it uses as much as digits as its factorization.

139301405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27860286.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 139301405 is about 11802.6016199819. The cubic root of 139301405 is about 518.3842909434.

The spelling of 139301405 in words is "one hundred thirty-nine million, three hundred one thousand, four hundred five".