139952305 has 4 divisors (see below), whose sum is σ = 167942772. Its totient is φ = 111961840.

The previous prime is 139952303. The next prime is 139952317. The reversal of 139952305 is 503259931.

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 102900736 + 37051569 = 10144^2 + 6087^2 .

It is not a de Polignac number, because 139952305 - 2¹ = 139952303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139952303) 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 3 ways as a sum of consecutive naturals, for example, 13995226 + ... + 13995235.

It is an arithmetic number, because the mean of its divisors is an integer number (41985693).

Almost surely, 2^139952305 is an apocalyptic number.

It is an amenable number.

139952305 is a deficient number, since it is larger than the sum of its proper divisors (27990467).

139952305 is an equidigital number, since it uses as much as digits as its factorization.

139952305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27990466.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 139952305 is about 11830.1439129032. The cubic root of 139952305 is about 519.1904377720.

The spelling of 139952305 in words is "one hundred thirty-nine million, nine hundred fifty-two thousand, three hundred five".