2162779939 has 2 divisors, whose sum is σ = 2162779940. Its totient is φ = 2162779938.

The previous prime is 2162779921. The next prime is 2162779991. The reversal of 2162779939 is 9399772612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2162779939 - 2¹³ = 2162771747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2162779939.

It is not a weakly prime, because it can be changed into another prime (2162779909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081389969 + 1081389970.

It is an arithmetic number, because the mean of its divisors is an integer number (1081389970).

Almost surely, 2^2162779939 is an apocalyptic number.

2162779939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2162779939 is an equidigital number, since it uses as much as digits as its factorization.

2162779939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 55.

The square root of 2162779939 is about 46505.6979197173. The cubic root of 2162779939 is about 1293.2151315627.

The spelling of 2162779939 in words is "two billion, one hundred sixty-two million, seven hundred seventy-nine thousand, nine hundred thirty-nine".