2781294071 has 2 divisors, whose sum is σ = 2781294072. Its totient is φ = 2781294070.

The previous prime is 2781294049. The next prime is 2781294077. The reversal of 2781294071 is 1704921872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2781294071 - 2⁶ = 2781294007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2781294077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390647035 + 1390647036.

It is an arithmetic number, because the mean of its divisors is an integer number (1390647036).

Almost surely, 2^2781294071 is an apocalyptic number.

2781294071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781294071 is an equidigital number, since it uses as much as digits as its factorization.

2781294071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 2781294071 is about 52737.9756058194. The cubic root of 2781294071 is about 1406.3140100417.

The spelling of 2781294071 in words is "two billion, seven hundred eighty-one million, two hundred ninety-four thousand, seventy-one".