2103979949 has 2 divisors, whose sum is σ = 2103979950. Its totient is φ = 2103979948.

The previous prime is 2103979931. The next prime is 2103979961. The reversal of 2103979949 is 9499793012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1892859049 + 211120900 = 43507^2 + 14530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103979949 - 2⁸ = 2103979693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2103979949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103979909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051989974 + 1051989975.

It is an arithmetic number, because the mean of its divisors is an integer number (1051989975).

Almost surely, 2^2103979949 is an apocalyptic number.

It is an amenable number.

2103979949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103979949 is an equidigital number, since it uses as much as digits as its factorization.

2103979949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The square root of 2103979949 is about 45869.1611979116. The cubic root of 2103979949 is about 1281.3876448942.

The spelling of 2103979949 in words is "two billion, one hundred three million, nine hundred seventy-nine thousand, nine hundred forty-nine".