2920139305 has 4 divisors (see below), whose sum is σ = 3504167172. Its totient is φ = 2336111440.

The previous prime is 2920139303. The next prime is 2920139329. The reversal of 2920139305 is 5039310292.

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 1832524864 + 1087614441 = 42808^2 + 32979^2 .

It is not a de Polignac number, because 2920139305 - 2¹ = 2920139303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2920139303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292013926 + ... + 292013935.

It is an arithmetic number, because the mean of its divisors is an integer number (876041793).

Almost surely, 2^2920139305 is an apocalyptic number.

It is an amenable number.

2920139305 is a deficient number, since it is larger than the sum of its proper divisors (584027867).

2920139305 is an equidigital number, since it uses as much as digits as its factorization.

2920139305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584027866.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 2920139305 is about 54038.3133063940. The cubic root of 2920139305 is about 1429.3366289190.

Adding to 2920139305 its reverse (5039310292), we get a palindrome (7959449597).

The spelling of 2920139305 in words is "two billion, nine hundred twenty million, one hundred thirty-nine thousand, three hundred five".