1813779347 has 2 divisors, whose sum is σ = 1813779348. Its totient is φ = 1813779346.

The previous prime is 1813779263. The next prime is 1813779353. The reversal of 1813779347 is 7439773181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1813779347 - 2¹² = 1813775251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1813779295 and 1813779304.

It is not a weakly prime, because it can be changed into another prime (1813779047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906889673 + 906889674.

It is an arithmetic number, because the mean of its divisors is an integer number (906889674).

Almost surely, 2^1813779347 is an apocalyptic number.

1813779347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813779347 is an equidigital number, since it uses as much as digits as its factorization.

1813779347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 50.

The square root of 1813779347 is about 42588.4884329087. The cubic root of 1813779347 is about 1219.5365405695.

The spelling of 1813779347 in words is "one billion, eight hundred thirteen million, seven hundred seventy-nine thousand, three hundred forty-seven".