1978063 has 2 divisors, whose sum is σ = 1978064. Its totient is φ = 1978062.

The previous prime is 1978051. The next prime is 1978087. The reversal of 1978063 is 3608791.

It is a weak prime.

It is an emirp because it is prime and its reverse (3608791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1978063 - 2⁹ = 1977551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1978363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989031 + 989032.

It is an arithmetic number, because the mean of its divisors is an integer number (989032).

2^1978063 is an apocalyptic number.

1978063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1978063 is an equidigital number, since it uses as much as digits as its factorization.

1978063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1978063 is about 1406.4362765515. The cubic root of 1978063 is about 125.5297623101.

The spelling of 1978063 in words is "one million, nine hundred seventy-eight thousand, sixty-three".