978525811 has 2 divisors, whose sum is σ = 978525812. Its totient is φ = 978525810.

The previous prime is 978525781. The next prime is 978525829. The reversal of 978525811 is 118525879.

It is a strong prime.

It is an emirp because it is prime and its reverse (118525879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978525811 - 2⁷ = 978525683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978525841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489262905 + 489262906.

It is an arithmetic number, because the mean of its divisors is an integer number (489262906).

Almost surely, 2^978525811 is an apocalyptic number.

978525811 is a deficient number, since it is larger than the sum of its proper divisors (1).

978525811 is an equidigital number, since it uses as much as digits as its factorization.

978525811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 46.

The square root of 978525811 is about 31281.3972034498. The cubic root of 978525811 is about 992.7900789698.

The spelling of 978525811 in words is "nine hundred seventy-eight million, five hundred twenty-five thousand, eight hundred eleven".