978512263 has 2 divisors, whose sum is σ = 978512264. Its totient is φ = 978512262.

The previous prime is 978512251. The next prime is 978512347. The reversal of 978512263 is 362215879.

It is a weak prime.

It is an emirp because it is prime and its reverse (362215879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978512263 - 2¹⁷ = 978381191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978512233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489256131 + 489256132.

It is an arithmetic number, because the mean of its divisors is an integer number (489256132).

Almost surely, 2^978512263 is an apocalyptic number.

978512263 is a deficient number, since it is larger than the sum of its proper divisors (1).

978512263 is an equidigital number, since it uses as much as digits as its factorization.

978512263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 978512263 is about 31281.1806522708. The cubic root of 978512263 is about 992.7854971175.

The spelling of 978512263 in words is "nine hundred seventy-eight million, five hundred twelve thousand, two hundred sixty-three".