2100979439 has 12 divisors (see below), whose sum is σ = 2313595800. Its totient is φ = 1906485984.

The previous prime is 2100979409. The next prime is 2100979513. The reversal of 2100979439 is 9349790012.

It is not a de Polignac number, because 2100979439 - 2¹² = 2100975343 is a prime.

It is a super-2 number, since 2×2100979439² = 8828229206201509442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100979439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100979409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95384 + ... + 115325.

It is an arithmetic number, because the mean of its divisors is an integer number (192799650).

Almost surely, 2^2100979439 is an apocalyptic number.

2100979439 is a deficient number, since it is larger than the sum of its proper divisors (212616361).

2100979439 is a wasteful number, since it uses less digits than its factorization.

2100979439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210794 (or 210781 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 2100979439 is about 45836.4422594075. The cubic root of 2100979439 is about 1280.7782212150.

The spelling of 2100979439 in words is "two billion, one hundred million, nine hundred seventy-nine thousand, four hundred thirty-nine".