1814780449 has 2 divisors, whose sum is σ = 1814780450. Its totient is φ = 1814780448.

The previous prime is 1814780441. The next prime is 1814780489. The reversal of 1814780449 is 9440874181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1814760000 + 20449 = 42600^2 + 143^2 .

It is an emirp because it is prime and its reverse (9440874181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1814780449 - 2³ = 1814780441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1814780399 and 1814780408.

It is not a weakly prime, because it can be changed into another prime (1814780441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907390224 + 907390225.

It is an arithmetic number, because the mean of its divisors is an integer number (907390225).

Almost surely, 2^1814780449 is an apocalyptic number.

It is an amenable number.

1814780449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1814780449 is an equidigital number, since it uses as much as digits as its factorization.

1814780449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 1814780449 is about 42600.2400110610. The cubic root of 1814780449 is about 1219.7608706720.

It can be divided in two parts, 18147 and 80449, that added together give a square (98596 = 314²).

The spelling of 1814780449 in words is "one billion, eight hundred fourteen million, seven hundred eighty thousand, four hundred forty-nine".