1778963 has 2 divisors, whose sum is σ = 1778964. Its totient is φ = 1778962.

The previous prime is 1778929. The next prime is 1778971. The reversal of 1778963 is 3698771.

It is a strong prime.

It is an emirp because it is prime and its reverse (3698771) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1778963 - 2⁶ = 1778899 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1778963.

It is not a weakly prime, because it can be changed into another prime (1778983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 889481 + 889482.

It is an arithmetic number, because the mean of its divisors is an integer number (889482).

2^1778963 is an apocalyptic number.

1778963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1778963 is an equidigital number, since it uses as much as digits as its factorization.

1778963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 1778963 is about 1333.7777176126. Note that the first 4 decimals coincide. The cubic root of 1778963 is about 121.1682880214.

The spelling of 1778963 in words is "one million, seven hundred seventy-eight thousand, nine hundred sixty-three".