978902579 has 2 divisors, whose sum is σ = 978902580. Its totient is φ = 978902578.

The previous prime is 978902549. The next prime is 978902597. The reversal of 978902579 is 975209879.

Together with next prime (978902597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978902579 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978902549) 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, 489451289 + 489451290.

It is an arithmetic number, because the mean of its divisors is an integer number (489451290).

Almost surely, 2^978902579 is an apocalyptic number.

978902579 is a deficient number, since it is larger than the sum of its proper divisors (1).

978902579 is an equidigital number, since it uses as much as digits as its factorization.

978902579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The square root of 978902579 is about 31287.4188612612. The cubic root of 978902579 is about 992.9174827067.

The spelling of 978902579 in words is "nine hundred seventy-eight million, nine hundred two thousand, five hundred seventy-nine".