2794179781 has 2 divisors, whose sum is σ = 2794179782. Its totient is φ = 2794179780.

The previous prime is 2794179779. The next prime is 2794179809. The reversal of 2794179781 is 1879714972.

2794179781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1722665025 + 1071514756 = 41505^2 + 32734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2794179781 - 2¹ = 2794179779 is a prime.

It is a super-2 number, since 2×2794179781² = 15614881297098415922, which contains 22 as substring.

Together with 2794179779, 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 (2794179581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1397089890 + 1397089891.

It is an arithmetic number, because the mean of its divisors is an integer number (1397089891).

Almost surely, 2^2794179781 is an apocalyptic number.

It is an amenable number.

2794179781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2794179781 is an equidigital number, since it uses as much as digits as its factorization.

2794179781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 55.

The square root of 2794179781 is about 52860.0017120696. The cubic root of 2794179781 is about 1408.4824779675.

The spelling of 2794179781 in words is "two billion, seven hundred ninety-four million, one hundred seventy-nine thousand, seven hundred eighty-one".