978575287 has 2 divisors, whose sum is σ = 978575288. Its totient is φ = 978575286.

The previous prime is 978575197. The next prime is 978575327. The reversal of 978575287 is 782575879.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978575287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978575887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489287643 + 489287644.

It is an arithmetic number, because the mean of its divisors is an integer number (489287644).

Almost surely, 2^978575287 is an apocalyptic number.

978575287 is a deficient number, since it is larger than the sum of its proper divisors (1).

978575287 is an equidigital number, since it uses as much as digits as its factorization.

978575287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9878400, while the sum is 58.

The square root of 978575287 is about 31282.1880149071. The cubic root of 978575287 is about 992.8068110966.

The spelling of 978575287 in words is "nine hundred seventy-eight million, five hundred seventy-five thousand, two hundred eighty-seven".