2621980139 has 4 divisors (see below), whose sum is σ = 2651440680. Its totient is φ = 2592519600.

The previous prime is 2621980121. The next prime is 2621980171. The reversal of 2621980139 is 9310891262.

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

It is a cyclic number.

It is not a de Polignac number, because 2621980139 - 2²⁰ = 2620931563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2621980096 and 2621980105.

It is not an unprimeable number, because it can be changed into a prime (2621980199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14730137 + ... + 14730314.

It is an arithmetic number, because the mean of its divisors is an integer number (662860170).

Almost surely, 2^2621980139 is an apocalyptic number.

2621980139 is a deficient number, since it is larger than the sum of its proper divisors (29460541).

2621980139 is an equidigital number, since it uses as much as digits as its factorization.

2621980139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29460540.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 2621980139 is about 51205.2745232364. The cubic root of 2621980139 is about 1378.9328967932.

The spelling of 2621980139 in words is "two billion, six hundred twenty-one million, nine hundred eighty thousand, one hundred thirty-nine".