978828101 has 2 divisors, whose sum is σ = 978828102. Its totient is φ = 978828100.

The previous prime is 978828083. The next prime is 978828119. The reversal of 978828101 is 101828879.

It is a balanced prime because it is at equal distance from previous prime (978828083) and next prime (978828119).

It can be written as a sum of positive squares in only one way, i.e., 918393025 + 60435076 = 30305^2 + 7774^2 .

It is an emirp because it is prime and its reverse (101828879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978828101 - 2¹⁸ = 978565957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978828001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489414050 + 489414051.

It is an arithmetic number, because the mean of its divisors is an integer number (489414051).

Almost surely, 2^978828101 is an apocalyptic number.

It is an amenable number.

978828101 is a deficient number, since it is larger than the sum of its proper divisors (1).

978828101 is an equidigital number, since it uses as much as digits as its factorization.

978828101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 44.

The square root of 978828101 is about 31286.2286157984. The cubic root of 978828101 is about 992.8923006353.

The spelling of 978828101 in words is "nine hundred seventy-eight million, eight hundred twenty-eight thousand, one hundred one".