978988597 has 2 divisors, whose sum is σ = 978988598. Its totient is φ = 978988596.

The previous prime is 978988579. The next prime is 978988609. The reversal of 978988597 is 795889879.

Together with previous prime (978988579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 921365316 + 57623281 = 30354^2 + 7591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978988597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978988097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489494298 + 489494299.

It is an arithmetic number, because the mean of its divisors is an integer number (489494299).

Almost surely, 2^978988597 is an apocalyptic number.

It is an amenable number.

978988597 is a deficient number, since it is larger than the sum of its proper divisors (1).

978988597 is an equidigital number, since it uses as much as digits as its factorization.

978988597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91445760, while the sum is 70.

The square root of 978988597 is about 31288.7934730632. The cubic root of 978988597 is about 992.9465650268.

The spelling of 978988597 in words is "nine hundred seventy-eight million, nine hundred eighty-eight thousand, five hundred ninety-seven".