2779769893 has 2 divisors, whose sum is σ = 2779769894. Its totient is φ = 2779769892.

The previous prime is 2779769891. The next prime is 2779769899. The reversal of 2779769893 is 3989679772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2725570849 + 54199044 = 52207^2 + 7362^2 .

It is a cyclic number.

It is not a de Polignac number, because 2779769893 - 2¹ = 2779769891 is a prime.

Together with 2779769891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2779769891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389884946 + 1389884947.

It is an arithmetic number, because the mean of its divisors is an integer number (1389884947).

Almost surely, 2^2779769893 is an apocalyptic number.

It is an amenable number.

2779769893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2779769893 is an equidigital number, since it uses as much as digits as its factorization.

2779769893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72013536, while the sum is 67.

The square root of 2779769893 is about 52723.5231466942. The cubic root of 2779769893 is about 1406.0570715462.

The spelling of 2779769893 in words is "two billion, seven hundred seventy-nine million, seven hundred sixty-nine thousand, eight hundred ninety-three".