1978722703 has 2 divisors, whose sum is σ = 1978722704. Its totient is φ = 1978722702.

The previous prime is 1978722661. The next prime is 1978722727. The reversal of 1978722703 is 3072278791.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3072278791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1978722703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1978722203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989361351 + 989361352.

It is an arithmetic number, because the mean of its divisors is an integer number (989361352).

Almost surely, 2^1978722703 is an apocalyptic number.

1978722703 is a deficient number, since it is larger than the sum of its proper divisors (1).

1978722703 is an equidigital number, since it uses as much as digits as its factorization.

1978722703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 1978722703 is about 44482.8360494247. The cubic root of 1978722703 is about 1255.4371588589.

The spelling of 1978722703 in words is "one billion, nine hundred seventy-eight million, seven hundred twenty-two thousand, seven hundred three".