1978000613 has 2 divisors, whose sum is σ = 1978000614. Its totient is φ = 1978000612.

The previous prime is 1978000603. The next prime is 1978000631. The reversal of 1978000613 is 3160008791.

Together with next prime (1978000631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261528324 + 716472289 = 35518^2 + 26767^2 .

It is a cyclic number.

It is not a de Polignac number, because 1978000613 - 2¹⁶ = 1977935077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1978000603) 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, 989000306 + 989000307.

It is an arithmetic number, because the mean of its divisors is an integer number (989000307).

Almost surely, 2^1978000613 is an apocalyptic number.

It is an amenable number.

1978000613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1978000613 is an equidigital number, since it uses as much as digits as its factorization.

1978000613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 1978000613 is about 44474.7188074304. The cubic root of 1978000613 is about 1255.2844258336.

The spelling of 1978000613 in words is "one billion, nine hundred seventy-eight million, six hundred thirteen", and thus it is an aban number.