978503797 has 2 divisors, whose sum is σ = 978503798. Its totient is φ = 978503796.

The previous prime is 978503783. The next prime is 978503837. The reversal of 978503797 is 797305879.

978503797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921365316 + 57138481 = 30354^2 + 7559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978503797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978503597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489251898 + 489251899.

It is an arithmetic number, because the mean of its divisors is an integer number (489251899).

Almost surely, 2^978503797 is an apocalyptic number.

It is an amenable number.

978503797 is a deficient number, since it is larger than the sum of its proper divisors (1).

978503797 is an equidigital number, since it uses as much as digits as its factorization.

978503797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3333960, while the sum is 55.

The square root of 978503797 is about 31281.0453309988. The cubic root of 978503797 is about 992.7826339457.

It can be divided in two parts, 978503 and 797, that added together give a triangular number (979300 = T₁₃₉₉).

The spelling of 978503797 in words is "nine hundred seventy-eight million, five hundred three thousand, seven hundred ninety-seven".