2101379779 has 2 divisors, whose sum is σ = 2101379780. Its totient is φ = 2101379778.

The previous prime is 2101379723. The next prime is 2101379783. The reversal of 2101379779 is 9779731012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101379779 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101377779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050689889 + 1050689890.

It is an arithmetic number, because the mean of its divisors is an integer number (1050689890).

Almost surely, 2^2101379779 is an apocalyptic number.

2101379779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101379779 is an equidigital number, since it uses as much as digits as its factorization.

2101379779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 166698, while the sum is 46.

The square root of 2101379779 is about 45840.8091006256. The cubic root of 2101379779 is about 1280.8595664802.

The spelling of 2101379779 in words is "two billion, one hundred one million, three hundred seventy-nine thousand, seven hundred seventy-nine".