978598399 has 2 divisors, whose sum is σ = 978598400. Its totient is φ = 978598398.

The previous prime is 978598277. The next prime is 978598409. The reversal of 978598399 is 993895879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978598399 - 2¹¹ = 978596351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978598099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489299199 + 489299200.

It is an arithmetic number, because the mean of its divisors is an integer number (489299200).

Almost surely, 2^978598399 is an apocalyptic number.

978598399 is a deficient number, since it is larger than the sum of its proper divisors (1).

978598399 is an equidigital number, since it uses as much as digits as its factorization.

978598399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44089920, while the sum is 67.

The square root of 978598399 is about 31282.5574242260. The cubic root of 978598399 is about 992.8146270752.

The spelling of 978598399 in words is "nine hundred seventy-eight million, five hundred ninety-eight thousand, three hundred ninety-nine".