978676799 has 2 divisors, whose sum is σ = 978676800. Its totient is φ = 978676798.

The previous prime is 978676771. The next prime is 978676807. The reversal of 978676799 is 997676879.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978676799 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 (978676729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489338399 + 489338400.

It is an arithmetic number, because the mean of its divisors is an integer number (489338400).

Almost surely, 2^978676799 is an apocalyptic number.

978676799 is a deficient number, since it is larger than the sum of its proper divisors (1).

978676799 is an equidigital number, since it uses as much as digits as its factorization.

978676799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72013536, while the sum is 68.

The square root of 978676799 is about 31283.8104936084. The cubic root of 978676799 is about 992.8411393429.

The spelling of 978676799 in words is "nine hundred seventy-eight million, six hundred seventy-six thousand, seven hundred ninety-nine".